Suffragettes in replica prison clothing

Postcard with photograph of a group of suffragettes dressed in prison uniform. Some stand on the back of a vehicle hung with banners, others stand in front. Handwritten on the back of the card is 'Ada Flatman (in big hat), Holloway prisoner'.
Ada Flatman (1876-1952) joined the WSPU in 1907-08. She became an organiser, working in Bristol, Aberdeen, Liverpool, Cheltenham and Hereford.