Engineers tend to charge insurers £50-70 if instructed by insurers.
Solicitors instructing the same engineers sent in invoices for £100+, and up to £150 for the really dodgy solicitors deeply in bed with accident managment companies. Whilst the courts will uphold those charges, most northern circuitjudges being deeply dishonest too, acharge to you from a decent engineer should be less than £70.
Tell me where in the country you are, and I'll give you an idea who to use, And who to avoid…. I can only suggest people who were good to use from an insurance point of view, ie helpful, quick, cheap, good coverage and my memories are a bit "vintage", but in london, would suggest Collins or Wheelers, East Anglia/Essex use H G Doggetts, West Mids, ICE (Independent Consulting Engineers), East Yorks H Rook were ok, and South Yorks Assessors for Yorks. In Lancs, used to use a firm called Autocheck, and this area of the country is a particular minefield for honest engineers…
Hope this helps slightly. But honestly, the phone book might just bee the best first point of call.
I think the trade association they belong to means anyone us use should be MIMI.