Hi David,
There are 5 travellers booked to fly from Birmingham. There will be an airport representative at Birmingham - they usually carry a clipboard with Just You written on it so that you can see them however, if they are helping a fellow traveller through check in they may not be as noticeable. I would recommend that you use your Just You luggage labels so that they are able to look out for you too (and other travellers will also be able to spot you).
You will then be met by a Just You representative on arrival in Palma.
Sadly, you are unable to check-in online and will need to check in at the airport.
Kindest regards,
Julia