I like the sainsburys £10 ones and M&S ones.
Got some from Costco (can't remember the name). But they're all black, grey or navy.
But I need some summery coloured ones, (I've seen loads of hareem type trousers in stores which are nice but not sure they're me)
So......
I'm looking for high waist (or at least a deep enough rise that I'm not pulling them up)
Good dense fabric, not see through for me 
Might try white if it's opaque enough? Otherwise pink, patterned,purpley, blue?
I'm average 5'5", size 12 bum but bloaty waist (hence the higher waist)
DD and I looking in London this week, where should I search?
I'd rather look IRL than online so I can see how they are.