main 2003 se delhi me hoon.. till end of 2005 GZB P7 milta tha Poorva ko.. later Loco link HWH P4 ho gaya..
again LHB ka reason ye hai ki IR ki 1st AC Exp thi Poorva.. Rajdhani ali livery thi iske pas.. n LHB mila to mila hi loco link bhi P4 se P7 ho gaya... kuch to baat hai meri fav train me... n ab to meri 2nd fav VS ko bhi LHB milne wala hai :P