In March 1942 Lamerton was involved in North Atlantic convoy duties between Liverpool and Hvalfjord in Iceland. By November Lamerton took part in the Allied landings in North Africa. An unopposed landing off Bone, Algeria was made on the 12th but when daylight came, she was subjected to many dive bombing attacks but managed to escape unharmed.

In February 1943, whilst escorting a supply convoy off the Algerian coast in company with the destroyers HMS Wheatland, HMS Easton and HMS Bicester, they detected and destroyed the Italian submarine Asteria on the 17th, and again on the 23rd the German submarine U-443 off Algiers. During May she blockaded shipping off the Tunisian coast, thereby preventing them from making a run for Sicily and Sardinia. In July she was involved in operation Husky. When the attack on the Italian mainland began, Lamerton was heavily involved in warding off air attacks in the Straits of Messina. In September 1943, after the surrender of Italy, she was engaged in operations off the Yugoslavian coast.

On 21 September 1945, Lamerton entered the Selborne dry dock at Simonstown, South Africa and commenced refitting. On 9 November 1945 she was undocked.

On 27 April 1953 Lamerton was lent to the RIN for a period of three years on condition that she could be returned on request, should an emergency occur. She was renamed Gomati on 5 May Later she was purchased from Britain. Gomati was paid off in 1975.