I need some help please:

Does anyone have any info on one of the Cain brothers, Derek? (Cyril a famous photographer, Albert a blacksmith and John with a sister called Margaret I think.

DNA testing has confirmed he's my real Dad. He was with my Mum when she was only 17 and working at the Matlock hotel? in 1966 for the summer over from Liverpool.

I am 57 so it's been a shock only just finding out.

Would love to see if anyone has any info they can share.
Huge thanks.