diff --git a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/20221030181404_Tags_Many_To_Many.Designer.cs b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/20221030181404_Tags_Many_To_Many.Designer.cs
new file mode 100644
index 0000000..78ea45f
--- /dev/null
+++ b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/20221030181404_Tags_Many_To_Many.Designer.cs
@@ -0,0 +1,158 @@
+// <auto-generated />
+using System;
+using LeedsBeerQuest.API.Data.Contexts;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace LeedsBeerQuest.API.Data.Migrations
+{
+    [DbContext(typeof(LeedsBeerQuestDbContext))]
+    [Migration("20221030181404_Tags_Many_To_Many")]
+    partial class Tags_Many_To_Many
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "6.0.10");
+
+            modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Category", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Categories");
+                });
+
+            modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Tag", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Tags");
+                });
+
+            modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Venue", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Address")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("CategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("DateAttended")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Excerpt")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("Latitude")
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("Longitude")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Phone")
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("StarsAmenities")
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("StarsAtmosphere")
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("StarsBeer")
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("StarsValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Thumbnail")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Twitter")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("Venues");
+                });
+
+            modelBuilder.Entity("TagVenue", b =>
+                {
+                    b.Property<int>("TagsId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("VenuesId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("TagsId", "VenuesId");
+
+                    b.HasIndex("VenuesId");
+
+                    b.ToTable("TagVenue");
+                });
+
+            modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Venue", b =>
+                {
+                    b.HasOne("LeedsBeerQuest.API.Data.Models.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Category");
+                });
+
+            modelBuilder.Entity("TagVenue", b =>
+                {
+                    b.HasOne("LeedsBeerQuest.API.Data.Models.Tag", null)
+                        .WithMany()
+                        .HasForeignKey("TagsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("LeedsBeerQuest.API.Data.Models.Venue", null)
+                        .WithMany()
+                        .HasForeignKey("VenuesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/20221030181404_Tags_Many_To_Many.cs b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/20221030181404_Tags_Many_To_Many.cs
new file mode 100644
index 0000000..4012a4b
--- /dev/null
+++ b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/20221030181404_Tags_Many_To_Many.cs
@@ -0,0 +1,77 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace LeedsBeerQuest.API.Data.Migrations
+{
+    public partial class Tags_Many_To_Many : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Tags_Venues_VenueId",
+                table: "Tags");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Tags_VenueId",
+                table: "Tags");
+
+            migrationBuilder.DropColumn(
+                name: "VenueId",
+                table: "Tags");
+
+            migrationBuilder.CreateTable(
+                name: "TagVenue",
+                columns: table => new
+                {
+                    TagsId = table.Column<int>(type: "INTEGER", nullable: false),
+                    VenuesId = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_TagVenue", x => new { x.TagsId, x.VenuesId });
+                    table.ForeignKey(
+                        name: "FK_TagVenue_Tags_TagsId",
+                        column: x => x.TagsId,
+                        principalTable: "Tags",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_TagVenue_Venues_VenuesId",
+                        column: x => x.VenuesId,
+                        principalTable: "Venues",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_TagVenue_VenuesId",
+                table: "TagVenue",
+                column: "VenuesId");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "TagVenue");
+
+            migrationBuilder.AddColumn<int>(
+                name: "VenueId",
+                table: "Tags",
+                type: "INTEGER",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Tags_VenueId",
+                table: "Tags",
+                column: "VenueId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Tags_Venues_VenueId",
+                table: "Tags",
+                column: "VenueId",
+                principalTable: "Venues",
+                principalColumn: "Id");
+        }
+    }
+}
diff --git a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/LeedsBeerQuestDbContextModelSnapshot.cs b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/LeedsBeerQuestDbContextModelSnapshot.cs
index 6d81ca4..5c415f2 100644
--- a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/LeedsBeerQuestDbContextModelSnapshot.cs
+++ b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Migrations/LeedsBeerQuestDbContextModelSnapshot.cs
@@ -29,7 +29,7 @@ namespace LeedsBeerQuest.API.Data.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("Categories", (string)null);
+                    b.ToTable("Categories");
                 });
 
             modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Tag", b =>
@@ -42,14 +42,9 @@ namespace LeedsBeerQuest.API.Data.Migrations
                         .IsRequired()
                         .HasColumnType("TEXT");
 
-                    b.Property<int?>("VenueId")
-                        .HasColumnType("INTEGER");
-
                     b.HasKey("Id");
 
-                    b.HasIndex("VenueId");
-
-                    b.ToTable("Tags", (string)null);
+                    b.ToTable("Tags");
                 });
 
             modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Venue", b =>
@@ -112,14 +107,22 @@ namespace LeedsBeerQuest.API.Data.Migrations
 
                     b.HasIndex("CategoryId");
 
-                    b.ToTable("Venues", (string)null);
+                    b.ToTable("Venues");
                 });
 
-            modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Tag", b =>
+            modelBuilder.Entity("TagVenue", b =>
                 {
-                    b.HasOne("LeedsBeerQuest.API.Data.Models.Venue", null)
-                        .WithMany("Tags")
-                        .HasForeignKey("VenueId");
+                    b.Property<int>("TagsId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("VenuesId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("TagsId", "VenuesId");
+
+                    b.HasIndex("VenuesId");
+
+                    b.ToTable("TagVenue");
                 });
 
             modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Venue", b =>
@@ -133,9 +136,19 @@ namespace LeedsBeerQuest.API.Data.Migrations
                     b.Navigation("Category");
                 });
 
-            modelBuilder.Entity("LeedsBeerQuest.API.Data.Models.Venue", b =>
+            modelBuilder.Entity("TagVenue", b =>
                 {
-                    b.Navigation("Tags");
+                    b.HasOne("LeedsBeerQuest.API.Data.Models.Tag", null)
+                        .WithMany()
+                        .HasForeignKey("TagsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("LeedsBeerQuest.API.Data.Models.Venue", null)
+                        .WithMany()
+                        .HasForeignKey("VenuesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
                 });
 #pragma warning restore 612, 618
         }
diff --git a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Models/Tag.cs b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Models/Tag.cs
index 425c822..e874b84 100644
--- a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Models/Tag.cs
+++ b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Models/Tag.cs
@@ -1,4 +1,5 @@
 using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
 
 namespace LeedsBeerQuest.API.Data.Models;
 
@@ -7,4 +8,7 @@ public class Tag
     [Key]
     public int Id { get; set; }
     public string Name { get; set; }
+
+    [JsonIgnore]
+    public virtual ICollection<Venue> Venues { get; set; }
 }
\ No newline at end of file
diff --git a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Seed/LeedsBeerQuestSeeder.cs b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Seed/LeedsBeerQuestSeeder.cs
index be5c904..0e71200 100644
--- a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Seed/LeedsBeerQuestSeeder.cs
+++ b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/Data/Seed/LeedsBeerQuestSeeder.cs
@@ -70,14 +70,29 @@ public class LeedsBeerQuestSeeder
 
         _dbContext.Venues.AddRange(venues);
 
-        _dbContext.SaveChangesAsync();
+        _dbContext.SaveChanges();
     }
 
     private IEnumerable<Tag> getTags(IEnumerable<LeedsBeerQuestCSV> csvData)
     {
-        var tags = csvData.Select(d => d.tags).Distinct();
+        var tagEntries = csvData.Select(d => d.tags);
+        var uniqueTags = new List<string>();
+
+        foreach (var tagEntry in tagEntries)
+        {
+            var tags = tagEntry.Split(',');
+
+            foreach (var tag in tags)
+            {
+                if (!uniqueTags.Contains(tag))
+                {
+                    uniqueTags.Add(tag);
+                }
+            }
+        }
+
         var tagId = 0;
-        foreach (var tag in tags)
+        foreach (var tag in uniqueTags)
         {
             tagId++;
             yield return new Tag
diff --git a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/LeedsBeerQuest.API.csproj b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/LeedsBeerQuest.API.csproj
index eaa913b..ac55e87 100644
--- a/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/LeedsBeerQuest.API.csproj
+++ b/backend/LeedsBeerQuest.API/LeedsBeerQuest.API/LeedsBeerQuest.API.csproj
@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
-      <DefineConstants>TRACE</DefineConstants>
+      <DefineConstants>TRACE;LBQ_SEED_DATA</DefineConstants>
     </PropertyGroup>
 
     <ItemGroup>