Refactor: Improve UK Phone number false failure hit-rate (#3136)

* UK Phone number update: Use better Ofcom regulations and self-document for better triage

Updated en-GB.yml using references to the UK Drama regulations via ofcom -> https://www.ofcom.org.uk/phones-and-broadband/phone-numbers/numbers-for-drama

Thanks to https://github.com/giggsey

Author: luke-hill

lib/locales/en-GB.yml

@@ -100,22 +100,21 @@ en-GB:
         - '44'
       formats:
         - '01#### #####'
-        - '01### ######'
-        - '01#1 ### ####'
-        - '011# ### ####'
+        - '01#1 496 0###'
         - '02# #### ####'
-        - '03## ### ####'
+        - '0306 999 0###'
         - '055 #### ####'
         - '056 #### ####'
         - '0800 ### ####'
-        - '08## ### ####'
-        - '09## ### ####'
+        - '0808 157 0###'
+        - '0902 ### ####'
+        - '0909 ### ####'
         - '016977 ####'
         - '01### #####'
         - '0500 ######'
-        - '0800 ######'
     cell_phone:
       formats:
+        - '07000 900###'
         - '071## ######'
         - '073## ######'
         - '074## ######'