The customs email is not sent by Online GAR when submitting a GAR from iPAD. It says email not sent whether the tickbox is ticked or not. This is for a flight to Le Touquet tomorrow, but I noticed it did the same on a prior trip to Alderney where the arrivals form was not generated either.

I have just resubmitted using the Windows application and the email is sent, when the box is ticked.

Both versions of app are latest versions.