▁with ▁a ▁few ▁vehicles ▁to ▁dual - pur pose ▁specification . ▁ ▁After ▁bus ▁der eg ulation ▁in ▁ 1 9 8 6 , ▁the ▁fleet ▁increased ▁gradually ▁to ▁around ▁twice ▁its ▁previous ▁size , ▁pe aking ▁at ▁ 1 7 ▁vehicles ▁in ▁ 2 0 0 2 , ▁reducing ▁to ▁ 1 6 ▁in ▁ 2 0 0 5 , ▁and ▁effectively ▁being ▁ 1 5 ▁from ▁February ▁ 2 0 0 7 ▁due ▁to ▁an ▁engine ▁problem ▁with ▁a ▁ 1 9 8 8 ▁Ley land ▁Lyn x . ▁The ▁c ess ation ▁of ▁service ▁ 5 9 ▁( see ▁below ) ▁saw ▁further ▁fleet ▁redu ctions , ▁and ▁by ▁mid - 2 0 0 8 , ▁the ▁fleet ▁number ed ▁ 1 3 . ▁The ▁divers ity ▁of ▁the ▁fleet ▁also ▁increased ▁with ▁new ▁and ▁second hand ▁Ley lands , ▁D enn ises ▁and ▁Vol vos , ▁and ▁more ▁recently ▁still , ▁Sc ania ▁L 9 4 s , ▁Opt are ▁Sol os ▁and ▁V DL ▁S B 2 0 0 s ▁joining ▁the ▁fleet . ▁The ▁emphas is ▁has ▁also ▁switched ▁from ▁coach es ▁to ▁service ▁bus es . ▁The ▁final ▁fleet ▁contained ▁three ▁coach es , ▁two ▁I ris b uses ▁and ▁a ▁Vol vo , ▁and ▁ 9 0 % ▁of ▁the ▁service ▁bus es ▁were ▁low - floor , ▁easy ▁access ▁types . ▁ ▁Services ▁The ▁main ▁service ▁was ▁latter ly ▁operated ▁joint ly ▁with ▁Tr ent b art on ▁as ▁" The ▁Black ▁Cat "