Any recommendations for a slimline concealed cistern? Seen screwfix unit at 100quid, 80mm wide. Anything better/similar? What about insulation to prevent condensation in the concealed location? It will back on to an outside wall. Thanks in advance.

No idea on the other issues but my experience with push button flushes made by grohe is not good, replaced twice in six years.

Thanks for that, will source elsewhere. Anyone else?

I went with bathempire, £40+P&P, slimness sounds similar, though that was not an aspect I’d researched, 80mm is pretty slim IMO!

80/90mm seems standard for slim units. The bathempire would be too deep but thanks.