The precise criteria when I booked mine were 6 months & 1 week (189 days) after your 2nd jab.rjb wrote: ↑22 Oct 2021, 12:06pm Well I checked today and I am now eligible for the booster, last week I wasn't despite being over the 6 month interval by a few days. Tried to book but the nearest centre offered was 20 miles away. The local ones in town and on my bus route were not available. There appears to be a rush going on at the moment. Levels of covid in the West country area are the highest in the country after they discovered 45000 incorrect PCR all clear tests. Looks like they are only offering slots up to 5 days ahead. I will try again next week after the half term rush. They are just offering it to younger age groups and suggesting that the 6 month interval between jabs is reduced to 5. This will put a lot of pressure on the jabbers.
IIRC although it only gave 5 days, I think there was a (not too obvious) link below them to show more dates. Some places are accepting "walk ins" too, at least at certain times.