I've found this covered litter tray easy to take the top off for scooping - I took the cat flap bit off though.

Van Ness CP6 Enclosed Cat Litter Tray at UKPetSupplies.com

That fake planter looks well cool!! But the tray area at 40cm diameter does sound a bit small.

Went to Pets at Home last night and got the basic covered tray. She used it last night and this morning, no problems. This is the fourth tray I've bought in 3 weeks. Should've just got the covered one in the first place. Live and learn. Thanks for all your advice.

Pleased you have it sorted.

Another advantage to a covered tray is the cat can't dig the litter out of it. Our three think they are excavating a basement when they cover their poop. We get litter all over the floor.

They also keep hyperactive dogs from running back and forth through the cat litter. Got one of those too.

I did just that as my old guy Milou started pooping out of the box - got a big black plastic storage box for only 8 euros and it works great - have always used hooded boxes and I have even found that Bamboo's coughing less now that the box is open!!!