If it's a Multi Point Lock (common on most UPVC doors) you'll need a locksmith to open door and fix problem.
Our website gives you an idea on what you can expect to pay, approx £45 to overcome failed lock and fixed quote once fault identified. Steer clear of national callcentres as they'll try and charge silly money.
www.pro-locksmiths.co.uk
Matt, December 2010
