I'm going back to work p/t soon in an office. I have one black skirt suit and a couple of tops. So need to purchase more. Apparently it's smart/casual. When I last worked c4/5 yrs ago I wore a lot of trousers and cardigans but feel that look would be a bit frumpy now. Thing is a suit may be too for a but cardigans are so handy and keep me warm. Do you have any tips on what to wear and wear to shop ( I'm mid forties, size 10/12, not a fashionista but defo not a grump.)