Welcome to rootschat,
It's important that you provide the information regarding his date and place of birth.
That said, I have a sneaking suspicion that the person referred to by Daisypetal is the person you seek. Assuming this is correct there are several leads for you to follow.
First off I would try and obtain his
Form CRS 10 from the British National Archive. If it has survived it should be in this piece
http://discovery.nationalarchives.gov.uk/details/r/C10989298These records are stored alphabetically in blocks of 60 names. If his form CRS 10 has survived it will tell you all the vessel's he served on from early 1941. together with dates and places of engagement and discharge.
You would be advised to visit TNA Kew yourself to investigate. It would also give you the opportunity to examine other records such as Survivors Reports, Logbooks and Crew Agreements etc but more of that later.
I would also contact London Metropolitan Archives who are the custodians of
Lloyd's Captains Register. This should give you details of all the ships he served on after his certification as Mate.
They have an excellent research service, although not cheap.
https://www.cityoflondon.gov.uk/things-to-do/history-and-heritage/london-metropolitan-archives/about-lma/paid-document-research-serviceBack to TNA Kew.
The last Logbook and Crew Agreement of EMPIRE CELT official number 164851, which will not only give an account of her loss but some personal details of her Master, including her Masters Certificate number.
http://discovery.nationalarchives.gov.uk/details/r/C11053542The official survivors report of EMPIRE CELT is in the piece ADM 199/2139, page 290.
I assume TNA is still closed due to the lockdown. You would have to enquire.
You can download for free the WW2 Movement Card of EMPIRE CELT
http://discovery.nationalarchives.gov.uk/details/r/D8650728