Now we have to have the category type on our drones does anyone know where youh can buy the appropriate sticckers from? And as a side question does anyone know which category a Phantom 4 Pro must have?

You dont need to have the category on the drone,   thats only applicable for new drones built to that standard,  older drones like the phantom as stuck in A3 airspace.     Also the labels mean nothing in the UK.  We have not adopted that system and rely on weight currently.  

Thank you for your advice. I have been out of drone flying for a few years because of illness so I am a little behind all these things.

embayweather Posted at 12-15 08:11
Thank you for your advice. I have been out of drone flying for a few years because of illness so I am a little behind all these things.

For the UK these are the current rules-




If you are flying over the 250g weight its worth looking into the Article 16 rules for non commercial flight which reduce the 150m to 30m but do require you to join a supported club like https://fpvuk.org to get the insurance etc thats needed.