Same regiment, see here 149 RHA/Field/A-T In June 1941 converted in 149 AT Regiment, Here a overview of locations and equipment.Northern Africa and Greece. Hope this will help you, but i can see that it is not easy to find information about this unit.
Here is a very brief summary for the unit: 149th Regiment, Royal Horse Artillery (Lancashire Yeomanry) (T.A.) HQ, 432nd, 433rd Btys: Hoylake The regiment was converted to a field regiment on 1 June 1940. It was sent to Egypt in March 1941 and arrived there on 20 June 1941. It was converted to 149th Anti-Tank Regiment on 1 July 1941 at Mena Camp with 432nd, 433rd, ‘X’/432nd, and ‘Z’/433rd Batteries and 36 2-pounders. It was under command of BTE from July to November 1941. It entered Tobruk in November 1941 and fought at El Duda during the breakout through 9 December. It then served with 8th Army in the desert until 12 July 1942. In January 1942, Z/433rd Battery was retitled 513th Anti-Tank Battery. The regiment was converted to a field regiment on 30 May 1942 and X/432nd Battery was interspersed throughout the regiment. It was reconverted to an anti-tank regiment on 4 July 1942. It came under command of 5th Indian Infantry Division in Egypt from 12 July until 9 September 1942. ‘S’ Anti-Tank Battery joined on 24 September 1942. The regiment served under command of 4th Indian Infantry Division from 9 September 1942 until 31 August 1945. It was in North Africa until 8 September 1943, in Palestine until 16 October 1943, in Syria until 9 November 1943, in Egypt until 2 December 1943, at sea until 9 December 1943, in Italy until 10 December 1944 and then Greece. ‘S’ Battery was numbered 318th on 1 May 1943 and 320th Battery joined on being formed on 10 May 1943. 318th Battery left on 26 May 1943.
Started as 149 RHA raised on the Wirral. Converted to a Field Regt RA and then anti-tank. There is a WW2 history called Shabash - 149 by EW Capleton published in 1963. A quick search turned up 3 copies - ABE books has one at £80, Barnebys have one in a sale at a fixed price of £33 & Amazon are offering copies starting from an eye watering £860. Bought mine about 30 years ago for £30 & glad I did. Good book, plenty of detail. If you are wondering about the title, 149 spent much of its later service with Indian formations. When they left their Indian friends they were told Shabash (Farewell).
Hi I have official history of 4 Indian Infantry Division first 3 months in Greece (WO 204/8301). 149 A/T Regiment get a few mentions. If you would like a copy, start a conversation with me, including your email address I will send it to you. Hope this helps Gus