Do most locksmiths work on Good Friday in the UK?

I desperately need a locksmith to come and fix one of my locks. But tomorrow is Good Friday, then the weekend after that, and then Bank Holiday on Monday, and I have to catch a flight on Tuesday so I'm not sure if I can get one in time to service my lock. What are the chances that my local locksmith would work on either Good Friday, Easter Monday or the Easter weekend?