Thanks for your post @SamGM, and a very warm welcome to our Community Forums!
If you would like to sign up for a new SIM card and have this added to your account, you can do this via our Sales Team - 0800 052 0238
Please ensure that you have your account number to hand - this will start with FA, to ensure that the newly created account can be added to your account
Kindest regards,
David_Bn