Late on a Sunday night, you put your key into the front door and it snaps when you turn it. Unable to get in, you search online for an emergency locksmith and find one advertising a willingness to do the job for £69. You call it out.
When the locksmith arrives, they ask no questions, drills through the lock within minutes and replaces the fixture. You are then given a bill for more than £700 with an invoice detailing a breakdown of the costs – all in excess of the original quote.