 This expansion was reflected in the creation of the County of London in 1889, detaching the areas subsumed by the city from Surrey.The expansion of London continued in the 20th century, engulfing Croydon, Kingston and many smaller settlements.This led to a further contraction of Surrey in 1965 with the creation of Greater London, under the London Government Act 1963; however, Staines and Sunbury-on-Thames, previously in Middlesex, were transferred to Surrey, extending the county across the Thames.