B9exchange
You can book just your second jab on the NHS.uk site, I would go ahead and do that. We booked DH's second AZ jab that way last night as he hadn't heard from the surgery. As a health informatician, I was quite impressed that the system could tell from his NHS number and DoB that he only needed the second jab, what he needed and when, and offered him a choice of appointments only on that day. There was only one site available, and it will be a 30 mile distance, but not a problem for us as we have a car. Slots keep coming up all the time, so my advice would be to keep checking every hour or so, and grab the first one you can get to.
This is do good to know - a reassuring back up. Thank you. Maybe if those of us who can easily travel do this, it would mean more time locally for GPS to deal with those who can’t travel or need a home visit.


