A bit of a cheeky question about referrals. On Thursday last I joined the bulb community through a comparison site (U-switch). The reason for this was because I had a question about selling electricity from my solar panels and whether this affected my right to switch. On Friday I had lunch with my sister in law and was telling her about my switch. She was upset because SHE is a bulb customer and has a referral code (bulb.co.uk/refer/xxxxxx) and because we had not discussed switching I didn't know. Is it possible to use her referral code in retrospect? She is a good ambassador for bulb and I would like to see her rewarded.