British Rail Classes 485 and 486

British Rail Class 485 British Rail Class 486
485045 at Shanklin.
In service	1923 - 1964 on London Underground 1967 - 1992 on Island Line
Manufacturer	Metro Cammell, Union Construction Company, Cammell Laird
Family name	Tube
Successor	Class 483
Formation	4 cars per trainset (4-VEC) 3 cars per trainset (3-TIS) DMBSO+TSO+TSO+DMBSO (4-VEC) DMBSO+TSO+DTSO (3-TIS)[1] 5 cars per trainset (5-VEC from 1985) 2 cars per trainset (2-TIS from 1985) DMBSO+TSO+TSO+TSO+DMBSO (5-VEC from 1985) DMBSO+DTSO (2-TIS from 1985)[2]
Diagram	EB261 (DMBS, 485, 486) EB262 (DMBS, 485) EE260 (DTS, 485, 486) EH261 (TS, 485, 486)[3]
Capacity	132 seats (4-VEC) 106 seats (3-TIS)
Operators	Network SouthEast
Specifications
Maximum speed	45 mph (72 km/h)[4]
Weight	94 t (93 long tons; 104 short tons) (4-VEC, set) 65 t (64 long tons; 72 short tons) (3-TIS, set) 32 t (31 long tons; 35 short tons) (MBSO) 19 t (19 long tons; 21 short tons) (TSO) 17 t (17 long tons; 19 short tons) (DTSO)[1][4]
Electric system(s)	660 V DC 3rd rail[5]
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 485 (or 4Vec, later 5Vec) and British Rail Class 486 (or 3Tis, later 2Tis) electrical multiple units were originally built for the London Electric Railway from 1923-31 as its 'Standard' tube stock. They were purchased by British Rail in 1967 and transported to the Isle of Wight to work 'mainline' services on the newly electrified Ryde to Shanklin line,^[1][6] where they worked for an additional quarter of a century. At the time of their purchase the units had already worked for over 40 years on the London Underground, but their introduction allowed the last steam locomotives on the line to be withdrawn.^[6]