▁about ▁the ▁potential ▁type ▁of ▁rolling ▁stock ▁that ▁would ▁be ▁used , ▁with ▁an ▁image ▁of ▁a ▁Class ▁ 4 4 5 ▁unit ▁used ▁to ▁indicate ▁the ▁proposed ▁type ▁of ▁train . ▁The ▁front ▁cover ▁also ▁had ▁an ▁artist ' s ▁impression ▁of ▁a ▁train ▁res emb ling ▁the ▁new ▁types ▁then ▁in ▁development ▁for ▁the ▁urban ▁networks ▁in ▁London , ▁Liverpool ▁and ▁Glasgow . ▁To ▁fit ▁with ▁the ▁T OP S ▁classification ▁of ▁the ▁other ▁types ▁power ed ▁via ▁O H LE , ▁the ▁planned ▁units ▁for ▁Manchester ▁were ▁assigned ▁as ▁Class ▁ 3 1 6 . ▁ ▁The ▁Class ▁ 3 1 6 ▁units ▁were ▁intended ▁to ▁replace ▁a ▁mix ▁of ▁different ▁types ; ▁the ▁une lect r ified ▁Bu xt on ▁line ▁( which ▁would ▁have ▁had ▁services ▁as ▁far ▁as ▁) ▁was ▁pre domin antly ▁operated ▁by ▁ ▁DM Us . ▁Other ▁services ▁from ▁Pic c ad illy ▁were ▁primarily ▁operated ▁by ▁ ▁EM Us , ▁while ▁ ▁units ▁operated ▁over ▁the ▁uniqu ely ▁elect r ified ▁B ury ▁line ▁from ▁Victoria . ▁ ▁Can cellation ▁Although ▁specific ations ▁for ▁the ▁Class ▁ 3 1 6 ▁units ▁were ▁prepared ▁by ▁the ▁British ▁Rail ▁Research ▁Division ▁at ▁Derby , ▁no ▁concrete ▁tender ▁propos als ▁were ▁issued ▁to ▁pros pective ▁manufact ur ers ▁before ▁the ▁final ▁can cellation ▁of ▁the ▁Pic c - V ic ▁project ▁in ▁ 1 9 7 7 . ▁ ▁Sub sequ ent ▁cross - city ▁connection ▁Following ▁the ▁can cellation ▁of ▁the ▁Pic c - V