HMS Petard 1961-
On completion in 1942 she was a ‘P’ class Destroyer with the number G56.
From 1953 to 1955 she was converted into a Type 15 Frigate with the number F56
At some point, maybe early 1960s, she was apparently renumbered as F26.
Broken up in 1967.
http://en.wikipedia.org/wiki/HMS_Petard_(G56)