I have found over the last 6 years the best 3 companies to use are SKS , Aldridge or Duffell’s. And instead of ordering stuff to be keyed a like my advice would be to invest in a re pinning kit. Heaps cheaper and quick and easy to learn.
Ollie’s Locks & Safe
https://www.besecure-locksmiths.co.uk/Gloucester-Locksmiths.html