 in 1955, metropolitan cammell produced its first lightweight diesel multiple units, the prototypes of what were to become british rail's most successful and longest-lived first generation dmu type, the class 101. == operations == the seven london midland region sets (formed dmbs + dtcl) were used on the bury-bacup line services, while the other sets were all allocated to the eastern region. these sets were used on a variety of lines in east anglia as well as the (then) non-electrified lines in essex (romford-upminster and wickford-southminster branches). a unit consisting of 79066 and 79282 worked the last passenger service on the aldeburgh branch line in 1966.great eastern journal no 64 (great eastern railway society) they proved to be very successful, but with line closures continuing through the 1960s, including many in east anglia where the type was first used, their non-standard coupling arrangements left them prone to early withdrawal, which took place during 1967-69. all were scrapped following withdrawal, except two (79047 + 79053), which were taken into departmental (non-revenue earning) service as 975018 + 975019. they were used at the railway technical centre in derby as laboratory 21: plasma torch research. when this extended life was complete, they too were scrapped, in 1981. == formations == two different formations were used: dmbs + dtsl: 79047 + 79263 through 79075 + 79291 dmbs + dtcl: 79076 + 79626 through 79082 + 79632 ==references==  == external links == * history of the met-camm lightweights 
British_Rail_diesel_multiple_units Metropolitan_Cammell_multiple_units