diff --git a/apps/admin-dashboard/src/components/source-config-panel.tsx b/apps/admin-dashboard/src/components/source-config-panel.tsx
index bb2b658..0816c2d 100644
--- a/apps/admin-dashboard/src/components/source-config-panel.tsx
+++ b/apps/admin-dashboard/src/components/source-config-panel.tsx
@@ -408,6 +408,40 @@ function FieldInput({
     )
   }
 
+  if (field.type === "multiselect" && field.options) {
+    const selected = Array.isArray(value) ? (value as string[]) : []
+
+    function toggle(optValue: string) {
+      const next = selected.includes(optValue)
+        ? selected.filter((v) => v !== optValue)
+        : [...selected, optValue]
+      onChange(next)
+    }
+
+    return (
+      <div className="space-y-2">
+        <Label className="text-xs font-medium">
+          {labelContent}
+        </Label>
+        <div className="flex flex-wrap gap-1.5">
+          {field.options!.map((opt) => {
+            const isSelected = selected.includes(opt.value)
+            return (
+              <Badge
+                key={opt.value}
+                variant={isSelected ? "default" : "outline"}
+                className={`cursor-pointer select-none ${isSelected ? "" : "opacity-60 hover:opacity-100"}`}
+                onClick={() => !disabled && toggle(opt.value)}
+              >
+                {opt.label}
+              </Badge>
+            )
+          })}
+        </div>
+      </div>
+    )
+  }
+
   if (field.type === "number") {
     return (
       <div className="space-y-2">
@@ -456,6 +490,8 @@ function buildInitialValues(
       values[name] = saved[name]
     } else if (field.defaultValue !== undefined) {
       values[name] = field.defaultValue
+    } else if (field.type === "multiselect") {
+      values[name] = []
     } else {
       values[name] = field.type === "number" ? undefined : ""
     }
diff --git a/apps/admin-dashboard/src/lib/api.ts b/apps/admin-dashboard/src/lib/api.ts
index 41ef9f0..772b534 100644
--- a/apps/admin-dashboard/src/lib/api.ts
+++ b/apps/admin-dashboard/src/lib/api.ts
@@ -9,12 +9,12 @@ function serverBase() {
 }
 
 export interface ConfigFieldDef {
-  type: "string" | "number" | "select"
+  type: "string" | "number" | "select" | "multiselect"
   label: string
   required?: boolean
   description?: string
   secret?: boolean
-  defaultValue?: string | number
+  defaultValue?: string | number | string[]
   options?: { label: string; value: string }[]
 }
 
@@ -54,6 +54,39 @@ const sourceDefinitions: SourceDefinition[] = [
       dailyLimit: { type: "number", label: "Daily Forecast Limit", defaultValue: 7, description: "Number of daily forecasts to include" },
     },
   },
+  {
+    id: "aelis.tfl",
+    name: "TfL",
+    description: "Transport for London tube line status alerts.",
+    fields: {
+      lines: {
+        type: "multiselect",
+        label: "Lines",
+        description: "Lines to monitor. Leave empty for all lines.",
+        defaultValue: [],
+        options: [
+          { label: "Bakerloo", value: "bakerloo" },
+          { label: "Central", value: "central" },
+          { label: "Circle", value: "circle" },
+          { label: "District", value: "district" },
+          { label: "Hammersmith & City", value: "hammersmith-city" },
+          { label: "Jubilee", value: "jubilee" },
+          { label: "Metropolitan", value: "metropolitan" },
+          { label: "Northern", value: "northern" },
+          { label: "Piccadilly", value: "piccadilly" },
+          { label: "Victoria", value: "victoria" },
+          { label: "Waterloo & City", value: "waterloo-city" },
+          { label: "Lioness", value: "lioness" },
+          { label: "Mildmay", value: "mildmay" },
+          { label: "Windrush", value: "windrush" },
+          { label: "Weaver", value: "weaver" },
+          { label: "Suffragette", value: "suffragette" },
+          { label: "Liberty", value: "liberty" },
+          { label: "Elizabeth", value: "elizabeth" },
+        ],
+      },
+    },
+  },
 ]
 
 export function fetchSources(): Promise<SourceDefinition[]> {
diff --git a/apps/admin-dashboard/src/routes/_dashboard.tsx b/apps/admin-dashboard/src/routes/_dashboard.tsx
index bfbf00b..eba5b8f 100644
--- a/apps/admin-dashboard/src/routes/_dashboard.tsx
+++ b/apps/admin-dashboard/src/routes/_dashboard.tsx
@@ -6,6 +6,7 @@ import {
   CircleDot,
   CloudSun,
   Loader2,
+  TrainFront,
   LogOut,
   MapPin,
   Rss,
@@ -41,6 +42,7 @@ const SOURCE_ICONS: Record<string, React.ComponentType<{ className?: string }>>
   "aelis.weather": CloudSun,
   "aelis.caldav": CalendarDays,
   "aelis.google-calendar": Calendar,
+  "aelis.tfl": TrainFront,
 }
 
 export const Route = createRoute({