It is crazy out there on the high street. They are all after your money and wanting you to buy the seasons must have jacket (the aviator one) from them. Instead I give you the thing furthest away from the £100 upwards needed to get one - socks.
The best transitional piece for your wardrobe right now is a good pair of ankle socks. Topshop has a great 3 pairs of sock for £7 offer on at the moment. Just add kitten heels and a-line skirt.