Now this is a subject ripe for further research! Wikipedia's Sherman page has precious little about UK service post-war - they claim a total of 17,184 supplied to the Brits under Lend-Lease - but I did find this: "M4A3s were also used by British forces in Indonesia during the Indonesian National Revolution until 1946, when they were passed on to the KNIL, which used them until 1949 before they were passed on to the Indonesian Army."
EDIT: this from Sherman Medium Tank M4: World War 2 In Review Special By Ray Merriam (linky) "By the end of the war 50% of the Shermans in British service were Fireflies. With the end of the war and with superior tanks entering service, the UK returned its Shermans to reduce its Lend-Lease payments. However, the US did not really want the Firefly conversions returned and many found their way from British stocks into other armies post-war, where they served until the 1960s in many cases"
Last Edit: Jan 31, 2017 10:11:08 GMT 12 by ZacYates
I posted a reply last night but it has not appeared? At the end of WWII UK retained there ex WW2 Comets and Churchills and introduced more Centurions (first accepted in 1945 but did not see combat). They did retain some specialist Shermans like Armoured Recovery Vehicles and Beach ARV.