▁own ▁railway ▁yard , ▁under ▁the ▁control ▁of ▁the ▁London der ry ▁Port ▁& ▁Har bour ▁Commission er ▁( LP HC ). ▁This ▁railway ▁had ▁connections ▁to ▁the ▁other ▁rail ways ▁in ▁London der ry ; ▁The ▁Great ▁Northern ▁and ▁the ▁Northern ▁Count ies ▁Committee , ▁both ▁of ▁which ▁were ▁ 5 ft 3 ▁gauge , ▁and ▁thanks ▁to ▁a ▁length ▁of ▁dual ▁gauge , ▁the ▁County ▁Don eg al ▁Rail ways ▁J oint ▁Committee ▁and ▁London der ry ▁& ▁L ough ▁Sw illy ▁Railway , ▁which ▁were ▁ 3   ft . ▁W ag ons ▁could ▁be ▁sh unted ▁across ▁the ▁Fo yle ▁by ▁way ▁of ▁the ▁lower ▁deck ▁of ▁the ▁Craig av on ▁Bridge , ▁which ▁was ▁dual ▁gauge . ▁Two ▁of ▁the ▁LP HC ▁locomot ives ▁surv ived ▁into ▁pres ervation - ▁No . ▁ 1 , ▁which ▁is ▁at ▁the ▁Ul ster ▁Fol k ▁& ▁Transport ▁Museum ▁in ▁Cult ra , ▁and ▁No . ▁ 3 , ▁which ▁is ▁owned ▁by ▁the ▁Railway ▁Pres ervation ▁Society ▁of ▁Ireland ▁at ▁White head . ▁ ▁The ▁port ▁saw ▁the ▁transport ▁of ▁many ▁goods ▁over ▁the ▁centuries . ▁Se ed ▁pot atoes ▁were ▁sh ipped ▁to ▁places ▁as ▁far ▁away ▁as ▁Egypt . ▁C attle ▁were ▁regularly ▁sh ipped ▁to ▁and ▁from ▁Glasgow ▁by ▁the ▁Burn s ▁and ▁La ird ▁ste amer ▁until ▁the ▁late ▁ 1 9 6 0 s . ▁Man ufact ured ▁items ▁including ▁lin en , ▁lin ole um ▁and ▁sh ir ts ▁were ▁export ed ▁to ▁Great