So these are the basics of the "Friends and Family" codes that come with Club Voyage membership (these are the "old" ones with 15 codes to give out - the new members only get 8 which makes me think that BF have tightened the screw a bit simply because the discounts are being so widely used).
(Up to a limit of 15 guest bookings per year. Maximum credit accruable £150 per annum, allocated when you renew your membership)
Personally I wouldn't give a code to someone I didn't know personally as I don't think the scheme was intended to do that and I certainly agree with Emmit's OP.
Friends and family rewards
Encourage your friends and family to book with us and they will receive a 10% discount on their booking. What's more, for every booking made, we'll credit your Club Voyage account with £10 towards your own future travel.(Up to a limit of 15 guest bookings per year. Maximum credit accruable £150 per annum, allocated when you renew your membership)
Personally I wouldn't give a code to someone I didn't know personally as I don't think the scheme was intended to do that and I certainly agree with Emmit's OP.