OK Andreas
Read you, but it would help if you straight away told us what you had checked.
Looking at one page dedicated to 112 Sq there is no Cameron listed in its roll call.
http://raf-112-squadron.org/nominal_roll.html
Doesn't proof anything, but I don't think our Cameron was detached from 112 Sq, and I think Shores is correct in his book.
Cheers
Stig