Thse go high up on the wall, just below the ceiling, and are angled downwards. Look on amazon.com (not .co.uk) for pictures and spec.
Not sure they're sold in the UK but you could ask a UK Klipsch dealer.
If you can bury cables in the walls, or just put up with cables going up the walls, but can't / won't / don't want to put in in-ceiling speakers, these are an alternative.
If you want floor level speakers that point upwards and bounce sound off the ceiling you won't get the best Atmos experience, but I'd dig around and see what you can find. Most of them are just bookshelf speakers pointed upwards anyway, IMHO.