British Rail Class 483

British Rail Class 483
A Class 483 at Smallbrook Junction
The refurbished interior of an Island Line Class 483 EMU.
In service	1938–1988 on London Underground (as 1938 stock) 1989–2021 on Island Line
Manufacturer	Metro-Cammell
Family name	Tube
Replaced	British Rail Classes 485 and 486
Successor	British Rail Class 484
Formation	2 cars per trainset
Capacity	84 seats (2 car set)
Operators	Island Line
Depots	Ryde depot
Specifications
Car length	52 ft 3+3⁄4 in (15.94 m)
Maximum speed	45 mph (72 km/h)
Weight	55 t (54 long tons; 61 short tons) each 2 car set.
Power output	500 kW (670 hp) total power per 2 car set.
Electric system(s)	660 V DC 3rd rail[1]
Current collector(s)	Contact shoe
Multiple working	Within class
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge

The British Rail Class 483 electric multiple units were originally built as 1938 tube stock units for London Underground. They were extensively refurbished between 1989 and 1992 by Eastleigh Works, for use on services on the Isle of Wight's Island Line. This was despite having already been used for nearly 50 years on the London Underground network. The units replaced the even older and life-expired British Rail Classes 485 and 486 units which were introduced in 1967, but were originally built as 'Standard' stock units for the London Electric Railway in 1923.

The 483s were 83 years old when they were withdrawn in January 2021; they were the oldest passenger trains in Great Britain in regular passenger service at the time.^[2][3] That honour was passed to the London Underground 1972 Stock trains that are still in service on the Bakerloo line at 52 years old. The 483s were withdrawn on 3 January 2021, with the line closed from 4 January until 1 November 2021 for upgrade works, after which they were replaced by five two-car Class 484s.^[4][5] Of the six units present on the Island at the time of their withdrawal, all have been confirmed for preservation.