Any decent solicitors will give you up front costs, had this on my mums probate and the sale of three houses in the last 5 years. Always the amount stated was what was paid. Always ask to be contacted if there is any movement on the price quoted.
Most of what they do can be done by anyone and I do most of this myself.
Deed name changes they charge 800 to 1400 for round here can be done for gov fee only, quoted 1800 for power of attorney, got it done gov fee only, many of these things are quite straightforward.
Accountants are another scam used one once charged 570 to do a job that took me 5 minutes once I'd learned how to do capital gains tax myself its really easy most of the time. Been doing my own taxes for 20 years again so simple once you've done it once. I keep my books each week and add up and at end of year taxes done in an hour or two on gov.uk.
Also never get a will by a solicitor loads out there who come to you and do it for £99.00 but again these can be done by yourself with a little learning. Just need the signatures etc to be correct.
So many rip offs in this country you can get around by searching for info.