By public transport:The S4, 154, 157 and 455 bus services all stop at or near Wilson's School.
By train, travel either to Wallington or Waddon main line stations. From Wallington turn right onto Woodcote Road; you can either walk up Woodcote Road and turn left at the traffic lights onto Stafford Road, continuing along to Mollison Drive (about 15 - 20 minutes' walk) or you can catch a 157 bus in Woodcote Road. From Waddon, turn right out of the station, left into Purley Way, and right at Five Ways into Stafford Road (B271). Proceed to Mollison Drive (about 10 - 15 minutes' walk).
The Wallington and Waddon trains from Victoria and London Bridge take at least half an hour. You can get a fast train from Victoria (departing every few minutes from the high-numbered platforms on the far right) which will get to East Croydon in ten to fifteen minutes. There is a taxi rank at East Croydon station; alternatively turn right out of the station, cross over George Street, turn left at the junction with Park Lane, walk 100m to the Fairfield Halls and catch a 154 bus at bus stop KA.