There are 2 places on the form where a lat/long must be supplied IF the location does not have an ICAO code.The DD digital format is one of the acceptable formats.
BUT ... its required to 6 decimal points.
Skydemon is able to output into this format but NOT to 6 decimal places.
Might I suggest that this is changed to 6 decimals. I realise one could just add 2 zeros and Border Force would still find you. But since they are being so precise, this would help.
Thanks
David