the settlement is referred to as Stanes. It later appears as Stanis (1167), Stanys (1428), Steynys and Staynys (1535), before the modern spelling "Staines" is first used in 1578. The name derives from the Old English , meaning "stone", and may refer to a Roman milestone on the London to Silchester road that survived into the early Anglo-Saxon period. In order to promote the town's "riverside image" and to distance it from its association with the fictional character, Ali G, Spelthorne Borough Council voted in December 2011 to change its name from "Staines" to "Staines-upon-Thames". The formal renaming ceremony, conducted by the Lord Lieutenant of Surrey, Dame Sarah Goad, took place on 20 May 2012. The Royal Mail adopted the new name in mid-2013. Geography Location Staines-upon-Thames is in northeast Surrey, around from central London. It is close to the borders of Berkshire and Greater London. The town is linked to junction 13 of the M25 by the A30 and to the M3 by the A308. The area surrounding the borough council offices and the magistrates' courts, to the southeast of the town centre, is known as Knowle Green. Egham Hythe, also in Surrey, is on the south side of the Thames and is linked to Staines by Staines Bridge. Staines town centre is close to the confluence of the rivers Colne and Thames. A former millstream, known as Sweeps Ditch, ran to the east of the High Street, but much of its course was diverted underground in the 20th century. Severe flooding events have taken place in Staines in 1894, 1947, and 2014. Topography and geology Much of the town is built on gravel "islands" that rise above the low-lying floodplains of the Thames and Colne. These gravel deposits have a typical maximum elevation of above ordnance datum (AOD) and are as little as above the surrounding floodplain. Staines High Street, oriented northeast to southwest, runs across one of these islands to the site of the medieval bridge and was the nucleus of the Roman town. St Mary's Church, on "Binbury island" to the northwest of the centre, is thought to have been the focus of settlement activity in the late-Saxon period. Elevations below AOD were liable to flooding until the early 19th century and many areas of gravel are covered by muddy silts and sands. There are brickearth deposits to the east of the town, along the A30,