Frontier Mole wrote:If only you knew how the UKBA works!
I do.
Much more relevant to the OP's situation than the passage you quoted is the following Para from the same instructions:-
"146. When a person's employer is taken over by
another employer, the new employer should write to
us providing full details, a copy of the person's leave
to remain stamp, which can be found in the person’s
passport and quoting the worker's reference
number."
That is what I advised previously. Presumably that hasn't been done, otherwise it would be recorded on his file, which he has obtained. It is slightly worrying that they didn't notify the change of ownership when it occurred, but it is definitely better late than never. If the OP gets to the stage of seeking an extension without this info already on file, he could encounter problems.