Im sitting on Pendolino To Glasgow,08.30am London Euston to Glasgow Central,390 030,i think the Pendolino gives gives smoothest ride at 125mph in terms of spilling drinks etc,I've been on Great Western and drink spilled everywhere,i know the coach tilts but drinks don't spill so much,probably West coast is smoothest ride at 125mph,East Coast I'm not sure of haven't done for while