The UK has had its Budget in spring as far back as those given by Gladstone, starting in 1853. The 2017 Budget will be the last to be held in the spring - it will be moving to the autumn.
Sydney Buxton, Finance and Politics: An Historical Study, 1783–1885. Volume I (John Murray, 1888), pp. 108–09.
What did the Tottenham MP David Lammy say about the fire in Kensington?