I rode last night's highlander service to Fort William from Kings Cross. The service was indeed split, with the Inverness portion leaving at 2120 and my Fort William & Aberdeen service leaving a few minutes late from the scheduled departure time of 2214.
Coach G was locked out of use due to a power failure. Not a major issue initially as this was at the very rear end of the train, with the lounge car being towards the front. This coach wasn't removed during the split at Edinburgh, and in fact a new lounge and seated car were attached to the other side of coach G. This means you had to pass through to get to the lounge car which was also lacking power! Green glowsticks were placed in the corridor of coach G so you could navigate it in the dark. The poor attendant in the lounge car was having to run two coaches up in order to access a working microwave for breakfast!
I've never ridden the line out to Fort William prior to this, and my god what an absolute stunner of a railway that was. The landscape was breathtaking and the line takes the most fantastic route to wind through it all! Genuinely left me speechless!!!