If you don't know his fathers first name I suggest you obtain a copy of the marriage certificate which should give the full name and occupation of both the fathers. The information needed to obtain this is the wedding was registered in the 2nd quarter of 1942 in Leeds, Vol 9B, page 726.
This will cost £9.25 from the GRO.
Is there any chance that his parents could have married in Madras, India?.