Hi again,
My colleague has just suggested that whilst your membership number has been added to your booking, it might be worth having your membership card which you when you travel (in case you are asked to show it at check in) and keep hold of all boarding passes in case you need to make a claim after travel.
Hopefully it will all run smoothly and the above won't be required, but it's best to cover all bases.
Kindest regards,
Julia