Disabled guest + one carer = no need to use a 2 for 1 voucher as they have a free carer entry under this policy.
Disabled guest + one carer + one additional guest = one guest pays for a full price entry ticket, one carer gets free entry under this policy and the other guest gets free entry using the 2 for 1 voucher.
Disabled guest + one carer + two additional guests = one guest pays for a full price entry ticket, one carer gets free entry under this policy, one guest gets in for free using the 2 for 1 voucher and the other guest must purchase their own separate ticket.