Unfortunately there is no
official* way to apply for the stickers/certification unless you and your drone are physically located in the EEA at the moment of application. If you are located outside of the EEA, the option will not show up in the DJI Fly app or on the controller. I don’t think you’d ever see the option on the DJI Go app, even if in the EU.
I received my stickers in the UK 70 days after submitting my application (shipped from Barendrecht, NL). DJI quotes that they will mail the stickers within 5 working days of receiving the application, and delivery will be within 20 days of the shipment date. Once you receive the stickers you need to send photos of them applied to the drone, and your C1 certification PDF should be delivered electronically 2 working days after that.
The issue for me was that the stickers never left the warehouse after I applied — they got lost before getting shipped. Figured that out when I contacted them after not receiving the stickers 25 working days after applying. So they shipped another set. 25 working days after that I contacted them again since I still had not received (informing them that I was leaving on a trip for Iceland in a few weeks so needed the stickers ASAP), and they UPS Expressed me a second set of stickers which arrived 2 days later. If you manage to apply tomorrow you’d theoretically get the stickers between 1 and 21 August, if they don’t lose them like they did twice with mine.
Your only sure option is to buy a second
Mavic 3 or
Mavic 3 Classic on the used market, making sure it already has the stickers applied. Might need to buy it in the EU since most Mavic 3s sold in the UK don't have the stickers as far as I am aware (though I do think you have better odds with the Classic).
Other options:
- Fly your Mavic 3 as an A3 drone on your trip, or buy a Mini 3 to fly in A1.
- Go to the EU and apply for the stickers ASAP. They still might not arrive in time for your trip, though. I can fly to Dublin for £36 roundtrip as soon as tomorrow.
- There is a guy on eBay selling the stickers for £100. But the certification does not become official until you get the PDF certificate from DJI and I am not sure they'll give you one if you didn't complete the initial stages of the application first.
*There is an unofficial way but I don’t think it would help you since I don’t think you’d get the stickers in time for your trip.