I'll be traveling in the UK from 19 May through 5 June. When I was there last, around New Year's, the Virgin Voyager trainsets were quite overcrowded at times. Has the overcrowding eased? I'll be using an 8-day BritRail flexipass with travel planned between London and Manchester, Manchester and Edinburgh, Edinburgh and Fort William, Fort William and Manchester, and Manchester and London. Most travel will probably be on Virgin, ScotRail, and GNER. Are there any current service problems with any of these providers? Possible side trips include Fort William to Mallaig and the route along the Cumbria coast from Lancaster to Carlisle.