We received our Booster jab and Flu jab invitations this morning.
We have both booked to have both Booster and Flu injections done at the same time this Saturday, 2nd Oct.
Hopefully we will both feel safer after that. 
According to a report on the news yesterday AZ retains it’s effectiveness long term but Pfizer reduces quite dramatically down to 40% effective. after quite a short time period (six months? I forget) so boosters for that might be needed BUT all vaccines reduce the chance of needing hospital care if you do get the disease