I've just got ESYS and ISTA+ freshly installed and happy to help anyone who might fancy some coding changes or diagnostics. Although, I may have the software but not the skills, so could be a monkey with a knife
I have of course played with my cars, so far without bricking them, but goes without saying - 'at your own risk' 
PM me if interested, I live in Buckinghamshire.
I also found this enthusiast who also earns a bit of £ with a service, who got both ESYS and ISTA+ installed for me. I had ESYS before but I hadn't touched it for years and it was corrupted (I keep a laptop isolated for the car, but the comp was repurposed during lockdown). This guy logged in remotely, re-formatted the hard disk and installed the software. happy to introduce if anyone is keen, u can agree on terms directly. pls PM if interested.