Further to my last post, she received a text message on Christmas Eve from 'OUH*-NHS' with a link which took her to an online form where she entered some details. Within a minute she received a second message confirming location, date and time (29th December), so can't fault the speed of the thing. Understandably, she's a little apprehensive about going through with it, as well as getting it sooner than others in more need...
*Oxfordshire University Hospitals