Just 14 days from using a referral link, to get the additional £50 cashback, to my utilities being with Bulb. By far the cheapest deal for 100% green electric and 10% natural gas. In addition Bulb discount my monthly bill with a loyalty discount for staying with them. If you are also looking to take advantage of the additional £50 cashback from your first bill; this link will provide that bulb.co.uk/refer/mrijd7762 or join.bulb.co.uk/refer/mrijd7762
BTW - £50 referral works whether you take one or both fuels. Not tried using my first link to buy just gas, and getting £50; then using my second link to buy electric. Possible you would get £100 off, as Bulb aren’t mean at applying the discount. They have always been really good at honouring it.