In July 1957, Undine was refitted at Malta. On 27 October 1958, the 6th Frigate Squadron, including Undine, was off Ushant on passage from Portland to Gibraltar, when she suffered a loss of power, and while trying to turn out of line was hit by sister ship . Both ships received minor damage and had to return to Devonport for repairs.
In July 1957, Undine was refurbished at Malta. On October 27, 1958, the 6th Frigate Squadron, which included Undine, was on a voyage from Portland to Gibraltar via Ushant when she encountered power issues and while trying to change course collided with her sister ship. Both vessels experienced minor damage and had to return to Devonport for repairs.