Wales, Northern Ireland and now Scotland are inviting all over 18s for vaccination. In England we have this tedious system of moving down from 40 to 18 in two year blocks. So I guess 28-30 will be invited next, and then X days later it will be 26-28 year olds. Is this logistically the best way to maximise filling slots, or do we have more of a shortage of vaccines so they are managing it in this way to drag out the process without that being evident?