diff --git a/core/constants.py b/core/constants.py
index b4a383e..9a9703e 100644
--- a/core/constants.py
+++ b/core/constants.py
@@ -24,11 +24,11 @@ SIGS = [
    SIG(name="SIOTA", description="Silos on the Air", icon="wheat-awn", ref_regex=r"[A-Z]{2}\-[A-Z]{3}\d"),
    SIG(name="WCA", description="World Castles Award", icon="chess-rook", ref_regex=r"[A-Z0-9]{1,3}\-\d+"),
    SIG(name="ZLOTA", description="New Zealand on the Air", icon="kiwi-bird", ref_regex=r"ZL[A-Z]/[A-Z]{2}\-\d+"),
+   SIG(name="WOTA", description="Wainwrights on the Air", icon="w", ref_regex=r"[A-Z]{3}-[0-9]{2}"),
+   SIG(name="BOTA", description="Beaches on the Air", icon="water"),
    SIG(name="KRMNPA", description="Keith Roget Memorial National Parks Award", icon="earth-oceania", ref_regex=r""),
    SIG(name="WAB", description="Worked All Britain", icon="table-cells-large", ref_regex=r"[A-Z]{1,2}[0-9]{2}"),
-   SIG(name="WAI", description="Worked All Ireland", icon="table-cells-large", ref_regex=r"[A-Z][0-9]{2}"),
-   SIG(name="WOTA", description="Wainwrights on the Air", icon="w", ref_regex=r"[A-Z]{3}-[0-9]{2}"),
-   SIG(name="BOTA", description="Beaches on the Air", icon="water")
+   SIG(name="WAI", description="Worked All Ireland", icon="table-cells-large", ref_regex=r"[A-Z][0-9]{2}")
 ]
 
 # Modes. Note "DIGI" and "DIGITAL" are also supported but are normalised into "DATA".
diff --git a/server/webserver.py b/server/webserver.py
index aab70b0..a05dd28 100644
--- a/server/webserver.py
+++ b/server/webserver.py
@@ -12,6 +12,8 @@ from core.config import MAX_SPOT_AGE, ALLOW_SPOTTING
 from core.constants import BANDS, ALL_MODES, MODE_TYPES, SIGS, CONTINENTS, SOFTWARE_VERSION, UNKNOWN_BAND
 from core.lookup_helper import lookup_helper
 from core.prometheus_metrics_handler import page_requests_counter, get_metrics, api_requests_counter
+from core.sig_utils import get_ref_regex_for_sig
+from data.sig_ref import SIGRef
 from data.spot import Spot
 
 
@@ -140,6 +142,14 @@ class WebServer:
             json_spot = json.loads(post_data)
             spot = Spot(**json_spot)
 
+            # Converting to a spot object this way won't have coped with sig_ref objects, so fix that. (Would be nice to
+            # redo this in a functional style)
+            if spot.sig_refs:
+                real_sig_refs = []
+                for dict_obj in spot.sig_refs:
+                    real_sig_refs.append(json.loads(json.dumps(dict_obj), object_hook=lambda d: SIGRef(**d)))
+                spot.sig_refs = real_sig_refs
+
             # Reject if no timestamp, frequency, dx_call or de_call
             if not spot.time or not spot.dx_call or not spot.freq or not spot.de_call:
                 response.content_type = 'application/json'
@@ -171,6 +181,13 @@ class WebServer:
                 response.status = 422
                 return json.dumps("Error - '" + spot.dx_grid + "' does not look like a valid Maidenhead grid.", default=serialize_everything)
 
+            # Reject if sig_ref format incorrect for sig
+            print(spot.sig_refs[0])
+            if spot.sig and spot.sig_refs and len(spot.sig_refs) > 0 and spot.sig_refs[0].id and get_ref_regex_for_sig(spot.sig) and not re.match(get_ref_regex_for_sig(spot.sig), spot.sig_refs[0].id):
+                response.content_type = 'application/json'
+                response.status = 422
+                return json.dumps("Error - '" + spot.sig_refs[0].id + "' does not look like a valid reference for " + spot.sig + ".", default=serialize_everything)
+
             # infer missing data, and add it to our database.
             spot.source = "API"
             if not spot.sig:
diff --git a/views/webpage_add_spot.tpl b/views/webpage_add_spot.tpl
index 090ece9..3fa2b45 100644
--- a/views/webpage_add_spot.tpl
+++ b/views/webpage_add_spot.tpl
@@ -24,21 +24,31 @@
                 </div>
                 <div class="col-auto">
                     <label for="freq" class="form-label">Frequency (kHz) *</label>
-                    <input type="text" class="form-control" id="freq" placeholder="14100" style="max-width: 8em;">
+                    <input type="text" class="form-control" id="freq" placeholder="e.g. 14100" style="max-width: 8em;">
                 </div>
                 <div class="col-auto">
                     <label for="mode" class="form-label">Mode</label>
-                    <select id="mode" class="storeable-select form-select" style="max-width: 6em;">
+                    <select id="mode" class="form-select">
                         <option value="" selected></option>
                     </select>
                 </div>
+                <div class="col-auto">
+                    <label for="sig" class="form-label">SIG</label>
+                    <select id="sig" class="form-select">
+                        <option value="" selected></option>
+                    </select>
+                </div>
+                <div class="col-auto">
+                    <label for="sig-ref" class="form-label">SIG Reference</label>
+                    <input type="text" class="form-control" id="sig-ref" placeholder="e.g. GB-0001" style="max-width: 8em;">
+                </div>
                 <div class="col-auto">
                     <label for="dx-grid" class="form-label">DX Grid</label>
-                    <input type="text" class="form-control" id="dx-grid" placeholder="AA00aa" style="max-width: 8em;">
+                    <input type="text" class="form-control" id="dx-grid" placeholder="e.g. AA00aa" style="max-width: 8em;">
                 </div>
                 <div class="col-auto">
                     <label for="comment" class="form-label">Comment</label>
-                    <input type="text" class="form-control" id="comment" placeholder="59 TNX QSO 73" style="max-width: 12em;">
+                    <input type="text" class="form-control" id="comment" placeholder="e.g. 59 TNX QSO 73" style="max-width: 12em;">
                 </div>
                 <div class="col-auto">
                     <label for="de-call" class="form-label">Your Call *</label>
@@ -46,10 +56,10 @@
                 </div>
                 <div class="col-auto">
                     <button type="button" class="btn btn-primary" style="margin-top: 2em;" onclick="addSpot();">Spot</button>
-                    <span id="result-good"></span>
                 </div>
             </form>
 
+            <div id="result-good"></div>
             <div id="result-bad"></div>
 
             <p class="small mt-4 mb-1">* Required field</p>
diff --git a/webassets/js/add-spot.js b/webassets/js/add-spot.js
index 9b1a0e6..21fdf7e 100644
--- a/webassets/js/add-spot.js
+++ b/webassets/js/add-spot.js
@@ -13,6 +13,14 @@ function loadOptions() {
             }));
         });
 
+        // Populate SIG drop-down
+        $.each(options["sigs"], function (i, sig) {
+            $('#sig').append($('<option>', {
+                value: sig.name,
+                text : sig.name
+            }));
+        });
+
         // Load settings from settings storage now all the controls are available
         loadSettings();
     });
@@ -28,6 +36,8 @@ function addSpot() {
         var dx = $("#dx-call").val().toUpperCase();
         var freqStr = $("#freq").val();
         var mode = $("#mode")[0].value;
+        var sig = $("#sig")[0].value;
+        var sigRef = $("#sig-ref").val();
         var dxGrid = $("#dx-grid").val();
         var comment = $("#comment").val();
         var de = $("#de-call").val().toUpperCase();
@@ -48,6 +58,12 @@ function addSpot() {
         if (mode != "") {
             spot["mode"] = mode;
         }
+        if (sig != "") {
+            spot["sig"] = sig;
+        }
+        if (sigRef != "") {
+            spot["sig_refs"] = [{id: sigRef}];
+        }
         if (dxGrid != "") {
             spot["dx_grid"] = dxGrid;
         }
@@ -68,7 +84,7 @@ function addSpot() {
             type : 'POST',
             timeout: 10000,
             success: async function (result) {
-                $("#result-good").html("<button type='button' class='btn btn-success' style='margin-top: 2em;'><i class='fa-solid fa-check'></i> OK</button>");
+                $("#result-good").html("<div class='alert alert-success fade show mb-0 mt-4' role='alert'><i class='fa-solid fa-check'></i> Spot submitted. Returning you to the spots list...</div>");
                 $("#result-bad").html("");
                 setTimeout(() => {
                     $("#result-good").hide();