Opening Flap to Petrol Cap?

We have a Turbo Vauxhall Astra 2016 on hire but don't know how to open the flap to get to the petrol cap.
Helen Few, June 2017

you have to press unlock on the key fob twice so that all doors are unlocked then press the flap and it should spring open

Geoff C, June 2017
link Click here to see other fixes for Vauxhall Astra.