| Navy | The Royal Navy |
| Type | Frigate |
| Class | River |
| Pennant | K 259 |
| Built by | Smiths Dock Co., Ltd. (South Bank-on-Tees, U.K.) |
| Ordered | |
| Laid down | 7 Jan, 1942 |
| Launched | 28 Jul, 1942 |
| Commissioned | 21 Dec, 1942 |
| End service | 20 Sep, 1943 |
| Loss position | |
| History | Around 0500hours on 20 Sepember 1943, the German submarine U-270 fired a Gnat torpedo at HMS Lagan (Lt.Cdr. Albert Ayre, RNR (retired)) near convoy ON-202. The torpedo struck her in the stern. The position of the attack was 57º09'N, 27º28'W. The U-boat was then chased away by depth charges from the Canadian destroyer HMCS Gatineau and the badly damaged frigate was towed into a UK port where she arrived on 24 September. Damage was severe and she was declared a Constructive Total Loss (CTL). Damage sustained from torpedo was 30 feet of stern from frame 115 aft missing. 30 feet of after deck from frame 100 badly damaged. Forward superstructure damaged by debris including tinned food and depth charges raining down. 28 seamen were killed or missing.
Sold to be broken up for scrap on 21 May 1946. Commanding Officer: Hit by U-boat |
| Noteable events involving Lagan include: 12 May, 1943 13 May, 1943 |
