Our ZS EV was done locally and I think it was around £180 ish.
When I returned to pick up the ZS - I asked him if he would be infested in doing my wife’s Fiat 500 in a bit of a cash deal, for £250 ?.
He agreed and I left the Fiat 500 with him.
Both cars done from the B pillar back.
Have a look if you have a company called “Global Tints” in your area.
They are a country wide franchise.
Al lot of members have used Global.
They come to your house as long as you are in their catchment area.
You can get a quote at least ?.