Booking made for a time slot of one hour in length. Fitter telephoned to say that he had been allocated an emergency job and could not arrive within the slot. As I had to leave for another engagement (which I had advised when boking the service), I asked him to arrive as soon as possible. He arrived about 35 mins after the end of the original booked slot. He completed the work efficiently.
Reply from Max Locksmith Kensington

Our Kensington locksmith will aim to get to you within 20-40 minutes, and we're available 24 hours a day Our locksmith work is guaranteed with a 12 month manufacturers warranty on all parts and 90 days guarantee on all workmanship.