If you wish to add to your Shirejam booking, all you need to do is go to the booking website found here:
Log into the account that you used for your initial booking. If you have forgotten these details, you can use the forgotten password feature. Then you can add the extra spaces you require for your booking. Either pay the deposit via card or by bank transfer.
To add places please place a new order with the extra spaces you require. You can't amend the numbers on orders already placed.