(plus my direct neighbour, who doesn't have internet who I will persuade nicely in order to get the the extra voucher if required!)
I presume that also means you'll pay for 12 months of FTTP service for them? By taking out the voucher, they are contractually required to take service.
The cheapest option I know is Aquiss. Their service has a 12-month contract, which will cost a total of £360 (40/2) or £408 (80/20).
Vouchers generally require a "step change" doubling of speed, so the 40M option only works if the previously available speed was less than 20M.
(EDIT: if they currently have a BT phone line, then you could pay the difference between their current service and BT Fibre 1 or 2. However that would require a 24 month contract, so could work out just as expensive. Also in 2 years time they may find it difficult to "downgrade" back to a standard PSTN service).
Edited by candlerb (Mon 02-Nov-20 10:36:21)