Lyn L & mmitch. The C19 jabs are not controlled by the doctors but by another department entirely.Castle seems to be different! From what I can see & hear, & my NHS daughter tells me, the 2nd jabs are all 12 weeks after the first; a case of "don't ring me, I'll ring you"! I suspect the Govt. are using all the first deliveries of the vaccine to get as many people as possible partly immune & 12 weeks gives time for later batches to be used. And in the meantime, everyone has had one jab.