I gotta offer for £15 off Ocado voucher and free delivery

Hurby

Invite a friend to Ocado
…and get £5 off your groceries

Receive a £5 voucher (minimum order value of £75) by e-mail after each of your invited friends receives their first Ocado delivery.
£15 for the person you invite

Each friend you invite will be sent a £15 voucher to use on their first Ocado order. (from https://www.ocado.com)

In addition orders over £75 get delivered free of charge.

I am not sure whether this is the right forum area for this, but as it concerns giving two money-off vouchers to the parties concerned I am offering it. Only thing is I need to recommend somebody with their valid email. Once there is a registered customer with this email and they get their first delivery (with £15 discount), I will get my e-code for £5 off.