Here is a list of the cheaper mortgage possibilities.
Mortgages | compare thousands of mortgage and remortgage rates and deals - moneysupermarket
If you don't have the best credit history you might want to look into this site
Bad Credit Remortgage Company | Bad Credit Remortgages Online
However I think that it would be safest to go into a Bank if this is your first time. If you're trying to remortgage you might want to look into some info on that
Remortgage: Debt Consolidation by Remortgaging - moneto.eu
also the moneysupermarket site has remortgage options too.
