diff --git a/custom_components/waste_collection_schedule/waste_collection_schedule/source/rbwm_gov_uk.py b/custom_components/waste_collection_schedule/waste_collection_schedule/source/rbwm_gov_uk.py
index cd9c6320..7acca750 100644
--- a/custom_components/waste_collection_schedule/waste_collection_schedule/source/rbwm_gov_uk.py
+++ b/custom_components/waste_collection_schedule/waste_collection_schedule/source/rbwm_gov_uk.py
@@ -1,17 +1,18 @@
 from datetime import datetime
+from typing import Any
 
 import requests
-from bs4 import BeautifulSoup, NavigableString
+from bs4 import BeautifulSoup, Tag
 from waste_collection_schedule import Collection  # type: ignore[attr-defined]
 
 TITLE = "Windsor and Maidenhead"
 DESCRIPTION = "Source for Windsor and Maidenhead."
 URL = "https://my.rbwm.gov.uk/"
 TEST_CASES = {
-    "Windsor 1": {"uprn": 100080381393},
-    "Windsor 2": {"uprn": "100080384194"},
-    "Maidenhead 1": {"uprn": "100080359672"},
-    "Maidenhead 2": {"uprn": 100080355442},
+    "Windsor 1": {"postcode": "SL4 4EN", "uprn": 100080381393},
+    "Windsor 2": {"postcode": "SL4 3NX", "uprn": "100080384194"},
+    "Maidenhead 1": {"postcode": "SL6 8EH", "uprn": "100080359672"},
+    "Maidenhead 2": {"postcode": "SL6 5HX", "uprn": 100080355442},
 }
 
 
@@ -22,33 +23,74 @@ ICON_MAP = {
 }
 
 
-API_URL = "https://my.rbwm.gov.uk/special/your-collection-dates"
+API_URL = "https://forms.rbwm.gov.uk/bincollections"
+
+REQUEST_TEMPLATE = """-----------------------------{rand_id}
+Content-Disposition: form-data; name="{name}"
+
+{value}
+"""
+REQUEST_TEMPLATE_END = """-----------------------------{rand_id}--
+"""
+
+
+HEADERS = {
+    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 Edg/126.0.0.0",
+    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
+    "Content-Type": "multipart/form-data; boundary=---------------------------{rand_id}",
+}
+
+
+def construct_payload(data: dict[str, Any]) -> tuple[str, dict[str, str]]:
+    rand_id = datetime.now().strftime("%Y%m%d%H%M%S%f%f%H%m")
+    payload = ""
+    for key, value in data.items():
+        payload += REQUEST_TEMPLATE.format(rand_id=rand_id, name=key, value=value)
+    payload += REQUEST_TEMPLATE_END.format(rand_id=rand_id)
+    headers = HEADERS.copy()
+    headers["Content-Type"] = headers["Content-Type"].format(rand_id=rand_id)
+    return payload, headers
 
 
 class Source:
-    def __init__(self, uprn: str | int):
+    def __init__(self, uprn: str | int, postcode: str):
         self._uprn: str = str(uprn).zfill(12)
+        self._postcode: str = postcode
+
+    def _get_payload_data(self, form: Tag) -> dict[str, str]:
+        form_data = {"next": "next"}
+        for i in form.find_all("input"):
+            if i.get("name") == "injectedParams":
+                continue
+            form_data[i.get("name")] = i.get("value")
+            if i.get("name").endswith("_0_0"):
+                form_data[i.get("name")] = self._postcode
+                form_data[i.get("name").replace("_0_0", "_1_0")] = self._uprn
+        return form_data
 
     def fetch(self):
         s = requests.Session()
-        args = {
-            "uprn": self._uprn,
-            "subdate": datetime.now().strftime("%Y-%m-%d"),
-        }
-
-        # request needs to be made twice to get the correct response
-        r = s.get(API_URL, params=args)
-        r.raise_for_status()
-
-        r = s.get(API_URL, params=args)
+        r = s.get(API_URL)
         r.raise_for_status()
+        URL_BASE = "https://" + r.url.removeprefix("https://").split("/")[0]
 
         soup = BeautifulSoup(r.text, "html.parser")
 
-        table = soup.find("table")
+        form = soup.find("main").find("form")
+        next_url = form.get("action")
+        if next_url.startswith("/"):
+            next_url = URL_BASE + next_url
 
-        if not table or isinstance(table, NavigableString):
+        if not isinstance(form, Tag):
             raise Exception("Invalid response from API")
+        form_data = self._get_payload_data(form)
+        payload, headers = construct_payload(form_data)
+
+        r = s.post(next_url, data=payload, headers=headers)
+        r.raise_for_status()
+
+        soup = BeautifulSoup(r.text, "html.parser")
+        table = soup.find("table")
 
         entries = []
         for tr in table.find_all("tr"):
@@ -57,9 +99,7 @@ class Source:
                 continue
 
             bi_type = tds[0].text.split("Collection Service")[0].strip()
-
             date_string = tds[1].text.strip()
-
             date = datetime.strptime(date_string, "%d/%m/%Y").date()
             icon = ICON_MAP.get(bi_type.lower())  # Collection icon
             entries.append(Collection(date=date, t=bi_type, icon=icon))
diff --git a/doc/source/rbwm_gov_uk.md b/doc/source/rbwm_gov_uk.md
index fffad95d..749e5418 100644
--- a/doc/source/rbwm_gov_uk.md
+++ b/doc/source/rbwm_gov_uk.md
@@ -10,7 +10,7 @@ waste_collection_schedule:
     - name: rbwm_gov_uk
       args:
         uprn: "UPRN"
-        
+        postcode: "POSTCODE"
 ```
 
 ### Configuration Variables
@@ -18,6 +18,9 @@ waste_collection_schedule:
 **uprn**  
 *(String | Integer) (required)*
 
+**postcode**  
+*(String) (required)*
+
 ## Example
 
 ```yaml
@@ -26,7 +29,7 @@ waste_collection_schedule:
     - name: rbwm_gov_uk
       args:
         uprn: "100080381393"
-        
+        postcode: "SL4 4EN"
 ```
 
 ## How to find your