That’s the biggest issue, if the owner is happy with just using a standard unprotected outdoor circuit, that’s up to him and it will probably do the job, but if you put it in against regulation and something goes wrong, you’re liable.
I’d make sure that you’re covered, and at the very least get a contract to say you’re doing exactly the job the customer is asking for, and that you’ve at least advised and recommended a different solution.
Previous Motability Cars
2006 - 2009 Skoda Superb VR6 2.0tdi
2009 - 2012 Citroen C5 2.0tdi VTR Nav
2012 - 2015 Nissan Qashqai 1.5dci tekna
2015 - 2018 Ford Kuga 2.0tdi Titanium X
2018 - 2021 BMW 220d X drive 2 Series Active Luxury
2021 - 2023 Hyundai Kona Electric Premium SE
2023 - Hyundai Kona Electric Ultimate