Dear Sue,
I just checked my letter to General Registry and those details are what I sent to them except for address, though Margaret's address on her death certificate was the same in Oct of the same year.
Their answer is this:
"Unfortunately I have been unable to locate the death certificate for Thomas Burns despite extensive searching, though I did find reference to his burial in the Maughold burial register".
(then a list of reasons which include information inaccurate; did not take place IOM; event not registered).
Not sure what to do, I don't want to upset them by suggesting they look again!
Kind regards Diane