A couple initially expecting to pay less than £50 for a locksmith ended up victims of a "bait-and-switch scam" which ended up costing them more than £5,000, an investigation has found. The scam involves baiting a customer with an initial cheap quote before adding on hidden charges and carrying out unnecessary work that leads to spiralling costs. As part of the BBC's investigation, the company involved - 24/7 Locksmiths UK - was secretly filmed trying to charge up to 10 times the original quote f