hello hello 
shop i missed your exercise wear rec, if you were indeed asking me?!?
I favour american apparel leggings. they do one with little buttons at the sides. i think they are called placket crop and often cheap in sales (£11 ish). they wear and wash really well, I have pairs from 2008.
tops - i wear cheapo H&M long tanks usually. the £4 ones but with thick straps not spaghetti.
bras - have one from sweaty betty and one from JL (on it's last legs). may replace with a stella m one at some point (stocked on NaP and outnet)
I also LOVE lululemon. I like the Y tanks and the wunder under crops. really flattering, don't shift at all during a yoga practice, and wash brilliantly. they are more expensive though, I have one Y and two wunder unders compared to four AA placket crops and three H&M tanks.
i also generally start off wearing a l/s tee till i'm a bit warmer. these are the only thing my primarni l/s tees are good for! but it gets discarded after the first five mins, and I don't use at all if I'm practicing with my teacher in london as the room is HOT. or in india, ditto.