It wasn't a problem actually - not far from me, and gave me an opportunity to sit in their nice guests' office with a free coffee or two and get some work done via their wifi!
Except I didn't get long, as the guy reckoned he could repair the chip and cracks rather than replace. Before he started he showed me the parts - correct colour on the trims - and the screen, which had been supplied as a Mazda one. I queried this, but examination of the new screen showed it was a UK-supplied screen by Pilkingtons. I've never had any issue with Pilkington car glass which is always good quality. This one had the E-mark for soundproofing on it, an ear with a curve under it, so it is rated as soundproofed. But it didn't matter in the end as the repair is virtually invisible and the screen didn't crack during repair so it wasn't changed. He said it's possible for the cracks to progress later from within the repair, and to get in touch if that happens - it's warrantied for my ownership of the car, time unlimited. And I didn't have to pay anything, as my insurance covers repairs in full but has a £75 excess for replacement. I'm happy with that, on balance.
Roger