 the southern railway (sr) gave the designation 5-bel to the 5-car all-pullman electric multiple units which worked the prestigious brighton belle trains between london victoria and brighton. these units survived long enough in british rail ownership to be allocated tops class 403. between 1933 and 1935 the units were designated 5-pul (the 'pul' code was then used for the 6-pul units). ==construction== the sr electrified the london victoria to brighton line in the early 1930s, and full electric services commenced over the route from 1 january 1933. for the high-profile southern belle pullman train three five-car units, consisting entirely of pullman cars, were built. all fifteen cars were built by metropolitan cammell. in june 1934 the southern railway renamed the southern 
British_Rail_electric_multiple_units Metropolitan_Cammell_multiple_units Pullman_Car_Company_(UK) Southern_Railway_(Great_Britain)_electric_multiple_units