Hi Ann and welcome to the 42 RTR family! 42RTR sailed in SS Aronda from the Clyde on 26 April, arriving at Suez via the Cape on 13 June. It sounds as if Trooper Hellings was aboard. To find out more about the regiment's activities I would strongly recommend seeking a copy of the war diary for the period you are interested in. Contributor Drew5233 has a copy I know because he provided me with a copy for the period of my interest which includes yours. You might also apply for Trooper Hellings' army records which can be procured from MoD at a price. As to his squadron I am unaware of any available records. Soldiers were moved about and although the war diary is quite specific about the activities of the Officers the other ranks were just numbers. My Father was originally trained with 'C' squadron but, although I cannot know for sure, I believe he was fighting with 'B' squadron at the time of his capture on 1 June 1942. Individual tanks were transferred between squadrons to even up numbers after action losses. Your only hope is likely to be in having contact with anyone who served with him and I fear there are now few if any living survivors of the regiment. I do have a photograph of 'C' squadron taken at Warlingham in 1940 and when you qualify to use the personal message system if you send me an email address I will forward a copy. That gives you a 33% chance if you could identify him but, as I say he may not have remained with 'C' squadron even if he started there. By the way I would love to see your photograph if you could upload it.
Best wishes
Clive