First, chat to your professional to make sure they can spare the time. Then tell them to send you a request for the extra payment, in 30-minute chunks, at the same rate as the original booking.
We'll then ask you to approve the amount - look out for our email or text. You'll need to approve the extra payment as soon as you've received the request.
To help cover our banking and admin charges, we'll also add £2.50 to the extra payment.