Several wide spread potential Premier Inn locations throughout Oxfordshire and surrounding counties but for an initial plan focus on High Wycombe as a base.
The Samaritans Cycle route (as link below)
Distance: 129km
Elevation: 1422m
Taken from Komoot Roughwood Lane – Aldbury loop
Distance: 97.4 km
Elevation: 800m
From Komoot Marlow Bridge – Henley-on-Thames loop
Distance: 97.8 km
Elevation: 770m