As members of the BEF MGAGB are following the BEF guidelines, which differ from the FEI rulings. The BEF rules are:
The horse (or pony) must have received two injections for primary vaccination against equine influenza given no less than 21 days and no more than 92 days apart. Only these two injections need to have been given before a horse/pony can attend.
In addition, if sufficient time has elapsed a first booster injection must be given no less than 150 days and no more than 215 days after the second injection of the primary vaccination. Subsequently, booster injections must be given at intervals of not more than one year apart.
We do not expect the 6 monthly boosters for Spring Championships, but members are warned that some showgrounds may insist on it.