DD had her first in Birmingham in May, but then booked her second one for the end of this month near home. Then got a message that the original GP practice was offering second doses early, the weekend she was thinking about going back up to see friends anyway, so she went and duly got it there.
Meanwhile, the same weekend, apparently - no idea how it was advertised, I just saw the proud Tweet of CCG-chair partner at the practice, re having welcomed 250 people into the surgery - there had been a walk-in Pfizer clinic at our surgery, so had she not been intending to go away, she could have tried there. Possibly unsuccessfully, though, given the gap.
(Despite the proud welcoming in of 250 at most only half-vaxxed randoms off the street of a Saturday, of course back in the M-F, 8-6.30 real world, the surgery remains proudly inaccessible to even fully-vaxxed registered patients, but hey-ho).