Six four-car sets and six three-car sets were refurbished by BR's
Stewarts Lane depot in 1966-67. The four-car sets were initially classified Class 452 and numbered 041-046, later reclassified Class 485 and numbered 485041-046. Each unit was formed of a driving motor, two intermediate trailers, and a second driving motor. Thus, the formation was DMBSO+TSO+TSO+DMBSO. Some of the intermediate trailers were former driving trailers, with the cabs locked out of use. The three-car sets were classified Class 451 and numbered 031-036, later reclassified Class 486 and numbered 486031-036. A spare driving motor car was also refurbished, given the unit number 486037. Each of these units were formed of a driving motor, an intermediate trailer, and a driving trailer. Thus, the formation was DMBSO+TSO+DTSO. When introduced, the units carried all-over BR blue livery. This progressed to standard blue/grey livery in the 1970s, and finally some units received
Network SouthEast's blue livery with red and white stripes, following its introduction in 1986. Electric services on the Isle of Wight commenced on 20 March 1967. In service, the
4Vec units often worked alone, but sometimes in combination with a
3Tis unit, such that a train was formed of seven coaches known as a 7 Vectis.) ==Reformation==