Jeans from Gap are well fitting, also good for basic T´shirts etc.
I buy mainly in the sale, and then pounce at
1.) LK Bennett (very good stuff if you look past the formal dresses, bought two lovely fited long cardi´s there)
2.) Brora (again, only in sale or clearance), amazing quality that lasts years.
3.)White company (for mud coloured tops
4.) Jigsaw
5.) Hobs
I find Toast, M&S, East,Laura Ashley, Monsoon etc. too frumpy or boxy for me (am 38, size 12, 6ft), but my MIL (55) wears all these brands and looks a lot more stylish than me !
It very much depends on the person, doesn´t it?! I look REALLY frumpy in calf length skirts, or bias cut skirts. But on others it can look great.