 Many air raids attributed to Gotha bombers were, in fact, carried out by Zeppelin-Staaken R.VI or R.XIV bombers, with direct hits on the Royal Hospital Chelsea with the first 1,000kg bomb dropped on England, on 16/17 February 1918.St Pancras Station was attacked the next night.During the campaign from 18 December 1917 to 20 May 1918 the R.VIs of Rfa501 made eleven raids dropping 27,190kg (28tons) of bombs.