[boundaries] adding more exceptions for some of the UK's unitary authorities that are basically equivalent to city boundaries (smaller towns within the boundary can still override)

resources/boundaries/osm/gb.yaml

@@ -24,10 +24,20 @@
                 "1900654": "city"
                 # Bedford
                 "158396": "city"
+                # Blackpool
+                "148603": "city"
+                # Bournemouth
+                "130884": "city"
+                # Bristol
+                "57539": "city"
                 # Brighton and Hove
                 "114085": "city"
                 # Chelmsford
                 "176965": "city"
+                # Darlington
+                "153377": "city"
+                # Derby
+                "142308": "city"
                 # Dundee
                 "1921173": "city"
                 # Edinburgh
@@ -36,24 +46,48 @@
                 "2154556": "city"
                 # Glasgow
                 "1906767": "city"
+                # Hartlepool
+                "153375": "city"
                 # Kingston-upon-Hull
                 "60148": "city"
                 # Leicester
                 "162353": "city"
                 # Luton
                 "158392": "city"
+                # Middlesbrough
+                "150988": "city"
+                # Milton Keynes
+                "172504": "city"
                 # Nottingham
                 "123292": "city"
                 # Norwich
                 "172506": "city"
                 # Oxford
                 "394037": "city"
+                # Peterborough
+                "161640": "city"
+                # Plymouth
+                "189924": "city"
+                # Poole
+                "130891": "city"
                 # Portsmouth
                 "127167": "city"
                 # Reading
                 "115074": "city"
+                # Slough
+                "117097": "city"
+                # Southend-on-Sea
+                "76489": "city"
                 # Southampton
                 "127864": "city"
+                # Stoke-on-Trent
+                "163183": "city"
+                # Swindon
+                "110212": "city"
+                # Warrington
+                "147278": "city"
+                # Wokingham
+                "114311": "city"
                 # York
                 "134353": "city"