Route from London (Marylebone) to Leamington Spa

I'm not doing the route for a while, going for my bros wedding so don't want to do it in a day then be unable to walk! Had thought of a stop round oxford, but also thinking of going a bit further and having an easier day in.

Thanks for all the suggestions and coments

okay, i might just organise this anyway.. as i live nr marylebone and folks in banbury.. so this will figure somewhere around whitsun (late may).. 8.00 start - 4.00pm finish in a beer garden.. team of six would be good..

plenty of options to rest / exit back to london early..
i'll post under races/rides.. after tour of flanders..

al