▁on ▁the ▁She ern ess ▁and ▁Med way ▁Valley ▁lines ▁in ▁the ▁December ▁ 2 0 0 6 ▁tim et able . ▁Following ▁this ▁tim et able ▁change ▁the ▁fleet ▁was ▁reduced ▁to ▁six ▁service able ▁units . ▁There ▁were ▁five ▁sets ▁in ▁' w arm ▁store ' ▁at ▁Ash ford ▁Chart ▁Le acon , ▁and ▁one ▁unit , ▁ 5 0 8 2 1 2 , ▁was ▁can n ib al ised ▁to ▁keep ▁the ▁surv iving ▁service ▁units ▁in ▁operation , ▁including ▁the ▁swap ▁of ▁its ▁T SO ▁coach ▁with ▁one ▁from ▁a ▁unit ▁that ▁ran ▁into ▁a ▁tree ▁on ▁the ▁Red hill ▁to ▁Ton bridge ▁Line . ▁With ▁the ▁transfer ▁of ▁the ▁Ton bridge ▁to ▁London ▁via ▁Red hill ▁services ▁to ▁Southern , ▁S out he astern ▁placed ▁its ▁remaining ▁ 5 0 8 s ▁in ▁store ▁in ▁December ▁ 2 0 0 8 . ▁ ▁Silver link ▁Silver link ▁le ased ▁three ▁ 5 0 8 s ▁from ▁Angel ▁Tra ins ▁in ▁ 2 0 0 3 ▁for ▁operation ▁on ▁the ▁Wat ford ▁DC ▁Line ▁to ▁assist ▁its ▁fleet ▁of ▁ ▁EM Us . ▁These ▁were ▁with dra wn ▁following ▁the ▁delivery ▁of ▁ ▁Capital star ▁units . ▁These ▁three ▁Class ▁ 5 0 8 / 3 ▁units ▁were ▁modified ▁by ▁Al st om ▁East le igh ▁to ▁designs ▁provided ▁by ▁Inter f le et ▁Technology ▁to ▁make ▁them ▁inter - oper able ▁with ▁Class ▁ 3 1 3 ▁units . ▁ ▁Fle et ▁information ▁▁ ▁They ▁were ▁originally