Hello. My mum has offered on a house and is going through hoops trying to get the mortgage sorted.
Apparently products are disappearing by the day etc. etc.

I was feeling quite smug that we got a really good fixed rate till late 2011, that's portable

etc... before all the recent interest rate rises.
My mum however, with all her new property knowledge gleaned from one offer on a house in forty years

, she reckons that my mortgage deal conditions etc. have all changed because of the credit crunch. She says it won't be portable now and my mortgage will be hit like the rest of them with all the credit hoo-haa going on.
Is she right? Can the recent state of things like Northern Rock, credit crunches etc. really affect my fixed rate deal?