We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Uk mobile number
It seems like the uk mobile number is not in the right format 
it's completely not valid
some examples of them: 
+44(0)9128 405119
(01414) 35336
01231052134
Uk mobile number
It seems like the uk mobile number is not in the right format 
it's completely not valid
some examples of them: 
+44(0)9128 405119
(01414) 35336
01231052134

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `faker/providers/phone_number/en_GB/__init__.py`
Content:
```
1 from __future__ import unicode_literals
2 from .. import Provider as PhoneNumberProvider
3 
4 
5 class Provider(PhoneNumberProvider):
6     formats = (
7         '+44(0)##########',
8         '+44(0)#### ######',
9         '+44(0)#########',
10         '+44(0)#### #####',
11         '0##########',
12         '0#########',
13         '0#### ######',
14         '0#### #####',
15         '(0####) ######',
16         '(0####) #####',
17     )
18
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/faker/providers/phone_number/en_GB/__init__.py b/faker/providers/phone_number/en_GB/__init__.py
--- a/faker/providers/phone_number/en_GB/__init__.py
+++ b/faker/providers/phone_number/en_GB/__init__.py
@@ -3,6 +3,15 @@
 
 
 class Provider(PhoneNumberProvider):
+    # Source: https://en.wikipedia.org/wiki/Telephone_numbers_in_the_United_Kingdom
+
+    cellphone_formats = (
+        '+44 7### ######',
+        '+44 7#########',
+        '07### ######',
+        '07#########',
+    )
+
     formats = (
         '+44(0)##########',
         '+44(0)#### ######',
@@ -15,3 +24,7 @@
         '(0####) ######',
         '(0####) #####',
     )
+
+    def cellphone_number(self):
+        pattern = self.random_element(self.cellphone_formats)
+        return self.numerify(self.generator.parse(pattern))

{"golden_diff": "diff --git a/faker/providers/phone_number/en_GB/__init__.py b/faker/providers/phone_number/en_GB/__init__.py\n--- a/faker/providers/phone_number/en_GB/__init__.py\n+++ b/faker/providers/phone_number/en_GB/__init__.py\n@@ -3,6 +3,15 @@\n \n \n class Provider(PhoneNumberProvider):\n+    # Source: https://en.wikipedia.org/wiki/Telephone_numbers_in_the_United_Kingdom\n+\n+    cellphone_formats = (\n+        '+44 7### ######',\n+        '+44 7#########',\n+        '07### ######',\n+        '07#########',\n+    )\n+\n     formats = (\n         '+44(0)##########',\n         '+44(0)#### ######',\n@@ -15,3 +24,7 @@\n         '(0####) ######',\n         '(0####) #####',\n     )\n+\n+    def cellphone_number(self):\n+        pattern = self.random_element(self.cellphone_formats)\n+        return self.numerify(self.generator.parse(pattern))\n", "issue": "Uk mobile number\nIt seems like the uk mobile number is not in the right format \r\nit's completely not valid\r\nsome examples of them: \r\n+44(0)9128 405119\r\n(01414) 35336\r\n01231052134\nUk mobile number\nIt seems like the uk mobile number is not in the right format \r\nit's completely not valid\r\nsome examples of them: \r\n+44(0)9128 405119\r\n(01414) 35336\r\n01231052134\n", "before_files": [{"content": "from __future__ import unicode_literals\nfrom .. import Provider as PhoneNumberProvider\n\n\nclass Provider(PhoneNumberProvider):\n    formats = (\n        '+44(0)##########',\n        '+44(0)#### ######',\n        '+44(0)#########',\n        '+44(0)#### #####',\n        '0##########',\n        '0#########',\n        '0#### ######',\n        '0#### #####',\n        '(0####) ######',\n        '(0####) #####',\n    )\n", "path": "faker/providers/phone_number/en_GB/__init__.py"}], "after_files": [{"content": "from __future__ import unicode_literals\nfrom .. import Provider as PhoneNumberProvider\n\n\nclass Provider(PhoneNumberProvider):\n    # Source: https://en.wikipedia.org/wiki/Telephone_numbers_in_the_United_Kingdom\n\n    cellphone_formats = (\n        '+44 7### ######',\n        '+44 7#########',\n        '07### ######',\n        '07#########',\n    )\n\n    formats = (\n        '+44(0)##########',\n        '+44(0)#### ######',\n        '+44(0)#########',\n        '+44(0)#### #####',\n        '0##########',\n        '0#########',\n        '0#### ######',\n        '0#### #####',\n        '(0####) ######',\n        '(0####) #####',\n    )\n\n    def cellphone_number(self):\n        pattern = self.random_element(self.cellphone_formats)\n        return self.numerify(self.generator.parse(pattern))\n", "path": "faker/providers/phone_number/en_GB/__init__.py"}]}