Further to my last, after struggling to get the telly down 't shop yesterday, it's now back home, with three new backlights and all seems to be working fine.
I got a deal on the repair cost though the two guys who run the shop will be having a fight over it on Monday - one of the owners quoted 120 quid and the other 70. And the first one said that there'd be no way it would be ready today, and quoted a Tuesday possibility.
Being a nice guy, and also Scottish, I phoned the shop like I'd been asked to on the shop's actual landline number, instead of the mobile one that's on the webpage, got the second owner this time, and he said the telly was fine, the bill would be seventy quid, and he'd deliver it to my door on the way back home for free.
As the shop owners are also both Scottish, expect an argument between the two owners on Monday morning over the outstanding fifty quid.