This is HMS Fleetwood, a Grimsby Class escort sloop. She was commissioned in 1936, was quite active in the war and after use as a radar trials ship was finally disposed of in 1959, scrapped at Gateshead. The "F" pennant number indicates the photo was taken after 1953 or so. Fleetwood's sister Wellington survives and is a familiar sight on the Thames as the Headquarters Ship of the Honourable Company of Master Mariners.
When I was a very Ordinary Seaman I was constantly admonished not to lean on the guardrails. Obviously this was not taken to heart by the "supervisors" (goofers?) in Fleetwood.
I never minded going over in a stage on the flat surfaces but was always terrified when doing the stem. As soon as they started hauling in on the winch and you began to be pulled into the side I was terrified from start to finish.Masts, Bridge superstructure and sides I never had a problem with.
During the first Cod War I was on an RFA Wave and there was a shortage of seamen for some reason so we were loaned about eight soldiers. The Bosun asked them if they had ever used a stage. One reply was "Only in a school play".