Recommendations for dresses for work please

[insan1tyscartching]

Dd 22 starts a new job soon working in local government. She has up until now always worn a work uniform (works in a bank) so she is pretty excited at the need to buy a work wardrobe.
Dd prefers to wear dresses rather than skirts or trousers,she's quite petite and a size six with neither big boobs or heavy thighs. She usually shops in Top Shop or Miss Selfridge with the occasional New Look purchase. She would never wear Primark and Dorothy Perkins clothes are too big.
I'd like to surprise her with a dress or two to start her work wardrobe paying probably up to £35 each although happy to be flexible on price tbh. Any recommendations please?