I'd like to see it on a mammoth 3-day super-tour. Start at London Kings Cross for an uber-fast charge up to Edinburgh. None of this poncy stopping at Stevenage, Peterborough, Doncaster, York, Darlington, Durham, Newcastle and Berwick-upon-Tweed, this tour is about covering maximum distance in the 3 days. We'd then pick up and have a 30 minute leg-stretching break before continuing to storm up through Aberdeen for a social call in Inverness for the night.
On Day 2, the only sensible place to take 55022 then would be Thurso and Wick before heading straight back down through Perth and into Glasgow for the night.
Day 3, and it's time once again to cover some more unusual track. Out of Glasgow nice and early for a storm down the Glasgow and Sou' Western to Carlisle before passing through and onto Crewe, where we'd have a leg stretching break before continuing down the Marches to Maindee North Junction before heading east and storming off to Acton and around into London Kings Cross.
Would have to cost a lot mind, but it would be mental.
On a day tour, it would again be out of Kings Cross and up to Cleethorpes for a few hours (catering for daytrippers mainly) before returning via Market Rasen to Lincoln and Newark for another fast run back to London.