Leagrave is about fifteen minutes from Wigmore, and there is no call-out charge anywhere in Luton, so LU4 costs the same as anywhere else. Sundon Park, Marsh Farm and Limbury are all the same.
For a business, the order of work is deliberately different. Getting you trading again comes first, and the proper fix comes second, even if that means a temporary arrangement for an afternoon. Nobody needs the tidy solution while the till is idle.
Remote first where it works, because it is faster and cheaper. On-site where it does not, which is most things involving cable, WiFi coverage or a machine that will not power on.
Everything is diagnosed before parts are ordered, and quoted before it is started. If the sensible answer is that you do not need me, you will be told that.