As Sam says above we Mortgage our home a 2 bed terrace. if we wanted to rent it it would cost around £550 - £600, we pay..er...a lot less than that.
We have always had a mortgae and used family as garantours (sp), I would recommend this as the mortgage if the bank give you a rubbish quote because payments arent high and most people can afford a lot more than the mortgage company think they can, so then you can get a higher mortgage amount to get a bigger house! Our terms and conditions stated only 30% was liable through the guarantours which was amazing. The guarantor mortgage was only valid as long as we were in uni, so we havent got it anymore, but I think they can be used without this clause.
Finally a little story of a quote I got from one bank, I phoned this bank up and was honest to them. We we're told that we could be given a mortgae of 18,000...thats right 18k...I think they must've miss heard something...I laughed and hung up! (funnily enough it was the same bank as our mortgage is with anyway!)