You've not mentioned the deposit!
Prior to the worldwide banking crisis, many lenders would offer a mortgage of up to (or even beyond) 5 times the gross income of the borrower, with perhaps only a 5% deposit (or even less) needed. Because that crisis was largely caused by people defaulting on their mortgages, lenders are now much more cautious about lending. You typically now require a deposit of at least 15%, with a lending limit set at around three times gross income for most borrowers.
As you'll see from here, mortgage rates are currently around 4%
http://tinyurl.com/bh3tr4o
but this calculator, from the BBC, wisely also shows how much you could end up paying if mortgage rates rose to 12%. (They've been above that figure within my memory):
http://www.bbc.co.uk/homes/property/mortgagecalculator.shtml
Chris