We had this same discussion in our belly buddies group as I had recieved the advice to have the vaccs at 6 weeks rather than 8 weeks. One of my belly buddies used to work for a vacc company and advised us that the vaccs had been ok'd for use at 6 weeks rather than 8 weeks.

The advice I was given by my ECHN and Paed was that this was the only one I needed to have 'early' and that the others would be as per the schedule.