Attached are some IWM pictures.
IWM NA 14737
British Sherman III (M4A2) in Italy 1944 with an e6160 .30 cradle
IWM BU 272
British Sherman V (M4A4) and a Firefly Vc, both with .30
IWM A 23671
13/18th Hussars Sherman IIIs on board LCT for D-day. All showing .30 mounts
IWM B 9461
A British Sherman V with a .50
IWM B 8830
A polish Sherman V with .30, followed by a Vc with .50
source:
https://www.iwm.org.uk/collections