Cracked it!
Think I've cracked it.
Her Wee Jock driver gives her a lift to Aberdeen (Think thats the nearest station). She takes the 0907 to Kings Cross arriving 1646 and is picked up by one of the spare bods from Mummy and Daddy's house. I am sure there are a few people around London that have a spare room she can use. Now, if she spends a day with the corgis and goes back on the 3rd from Euston leaving at 0930 she can get a bargain Super Off-Peak Return for £124 (Probably even cheaper if she has a railcard).
Better hurry though or the price will rise.
God I'm good. Even gives her a day to do the tourist thing.
Update: There's even a forward facing window seat in the quiet carriage. It just gets better!