I'm in Derby, perfect connection 99% of the time & max ping of 50ms to London speed test.
Give VM a call, i had problems all the time the chap from Tech support moved me to UBR05.
He said the UBR's have a traffic light rating
Black = Over subscribed to hell
Red = Over subscribed
Amber = slightly over subscribed
Green = All good
UBR05 was Green the others were Amber, Red and even Black
TBH i don't know VM's network inside out so this could have been a load of bull but it seemed to work!
PS I spoke to UK Tech support not India who just tell you to unplug wait 30 seconds etc...!!!