▁were ▁put ▁aside . ▁▁ ▁Im medi ately ▁after ▁the ▁Second ▁World ▁War , ▁there ▁was ▁a ▁short ▁bo om ▁in ▁demand ▁for ▁Wel sh ▁sl ate , ▁to ▁meet ▁reconst ruction ▁needs ▁throughout ▁the ▁United ▁Kingdom . ▁However ▁this ▁proved ▁to ▁be ▁a ▁short - l ived ▁period ▁of ▁success , ▁and ▁cheap ▁foreign ▁imports ▁of ▁sl ate ▁and ▁new ▁man - made ▁roof ing ▁materials ▁quickly ▁began ▁to ▁eat ▁into ▁the ▁market ▁for ▁the ▁higher - quality ▁and ▁more ▁expensive ▁Pen rh yn ▁product . ▁A ▁steady ▁decl ine ▁in ▁traffic ▁through ▁the ▁ 1 9 5 0 s ▁and ▁growth ▁in ▁the ▁use ▁of ▁roads ▁for ▁transport ing ▁sl ates ▁direct ▁from ▁the ▁quar ry ▁to ▁market ▁meant ▁the ▁end ▁of ▁the ▁railway ▁was ▁in ev itable . ▁In ▁June ▁ 1 9 6 2 , ▁the ▁last ▁sl ate ▁train ▁ran , ▁though ▁a ▁few ▁uno fficial ▁tri ps ▁were ▁run ▁as ▁late ▁as ▁the ▁summer ▁of ▁ 1 9 6 3 . ▁ ▁Tra ffic ▁and ▁rolling ▁stock ▁ ▁He ading ▁sea wards ▁( n orth wards ) ▁from ▁the ▁quar ry ▁at ▁Beth es da ▁the ▁first ▁( C il ger aint ) ▁incl ine ▁was ▁by pass ed ▁by ▁building ▁an ▁almost ▁parallel ▁straight ▁line ▁at ▁a ▁gent ler ▁end - to - end ▁gradient ▁whose ▁foot ▁was ▁some ▁distance ▁north ▁of ▁the ▁foot ▁of ▁the ▁incl ine . ▁A ▁similar ▁approach ▁was ▁not ▁feas ible ▁for ▁the ▁other ▁two ▁incl ines , ▁so ▁the ▁traditional