I got 59, 78 and 81 wrong too (had the same answers as you), and luckily plumped for Penshurst instead of one or two other options. Fotheringhey is technically correct as it is one of a few castles Mary Queen of Scots was imprisoned in, and it was Mountbatten who was killed by an IRA bomb, I've never heard of a cousin of the Queen called Montgomery so think perhaps that is an error on the setters part. I've looked up holt on encarta and one of the meanings is an archaic word for a wooded area as well as an otter's lair.
Anyway, we have to accept the quizmaster's answer whatever we think.
I'll probably get the football one as I like my footie so it could be interesting to see the format.
Congatulations on your runner up prize too, now that you've started winning you'll hopefully get first prize next time.