System Health Check - Any recommendations?

Hi there, I have a mix of bought-new equipment and bought-used equipment. I've had mixed results on bought-used (one-input not working on a DAC, a CD player that has blown too many fuses for my liking) but certainly no horror stories.

Anyhow, I've just bought a used amp and used power conditioner and thought it a good idea to have the entire system checked by an expert. Kind of like having an annual health-check for yourself or a major service for a car. Has any member heard of someone who may offer this service? Furthermore, and by far the tougher question, I now live in the UK and wondered if anyone does this in the UK? While expensive I don't think it's a bad idea to spend 5-10% of the system cost each year to make sure everything is running in A1 condition.