What Route Should I Try First

I'll start the votes now. No German routes are allowed. English and French only

 

don't ask for a Swiss Train. Because I don't have it

 

Try the Northern Trans-Pennine route and thrash a peak through the countryside or a growler on a double headed Tees Valley Line steel run. Alternatively for something more modern try southeastern highspeed class 395 Javelin from Favesham to St Pancras.