Bike hire info moved to the bottom.

From Greenways website -
”The Haydon Hill extension was opened on 24 August 2021, linking the Greenway to central Aylesbury via the Emerald Way. The route was designed by Greenways, who obtained all the permission and supervised construction, Greenfords built it, Buckinghamshire Council were the client and Sustrans were the funders.”

From Bucks Free Press – “The new Greenway provides walkers and cyclists 1.7km of shared use path from Berryfields to Buckingham Park as part of the Aylesbury Gardenway project.
The traffic free route connects to other greenways and key locations such as Aylesbury Vale Parkway station, Waddesdon Greenway leading to Waddesdon Manor, and access to the Platinum and Ruby Way Gemstone routes.” “Costing around £400,000 …”.

PW Maps

Sonning Common
to Aylesbury
Indicitave route - Car

Three Maps for Aylesbury area. Biking.
Overview + E-Bike hire locations
.

Berryfields

Parkway<>Central area

Eureka!  E-Bikes at either end of the Greenway.  https://b-bikes.co.uk/  
Subscriptions https://www.moovbikes.co.uk/offers-subscription   Subscribing in advance is advisable?
Map shows available bikes https://www.moovbikes.co.uk/#the-map  (2 at Waddesdon, 9 at Aylesbury Parkway when I looked Sunday afternoon)
A review of the system = https://www.ianvisits.co.uk/articles/review-the-waddesdon-greenway-e-bike-hire-scheme-45830/

Other bike hire:-
otec.bike, 45 mins, 8.2 miles by bike or 20 minutes by CAR from Aylesbury Parkway Sta.
jacs-electricbikes.co.uk 13 mins, 2.3 miles by bike