Luckily the introduction of TPE seems to have solved that (with all their routes running into Piccadilly, so no need to re-split at Bolton).The Manchester Airport - Scotland services were frequently coupled to a First North Western service running between Manchester Airport and either Barrow or Windermere. The trains generally used to split and divide at Bolton. Northbound, the FNW "bit" (formed of a 156) was on the front, but then ran via Wigan North Western, which means it then arrived into Preston after the VT 158 "bit", which had departed Bolton after it. A timetabling nightmare really!
Yep, that happend on Saturday 10th September last year as I was on the class 450 you see in Portsmouth & Southsea station heading for Guildford when the HST pulled through the station I presume from the sidings at Fratton to go into Portsmouth Harbour.