Newly registered and I reckon you’re maybe not a HGV driver? It’s not a one day trip.
A guy I know about called ryan goes to Girona from south london practically everyday, now what’s his second name, that’s it air. 
actually I just looked on ryanair’s site and for the time your going they are only charging a fiver one way
well if you get to dover on the 28th and i’m down that way i’ll wave as i past by. 
There is always those two legs you’ve got you could either walk or push bike it.