Best answer by Beth_Boost
The voucher will be sent by email to you and your friend, 30 days after your friend has come on supply. if it's been longer than 30 days, or you weren't able to do it on the sign up then drop the Facebook/Twitter team a message with you and your friends email addresses and they can chase it up for you!
**UPDATED on 30/07/2019**
The refer a friend incentive has just been increased to £50! The offer only lasts until 5th August, so get referring now!