All credits for this deal goes to MSE. I am just posting it here for HotUKDealers to ensure they don't miss it!
1. Sign up. Use this specific link* – the deal's exclusive to MoneySavingExpert.
2. Choose to pay line rent upfront if you can afford to. It's cheapest if you pay the £185.88 year's line rent upfront (equiv £15.49/mth). It's then £17.99/mth after. If you don't pay line rent upfront it's £17.99/mth for the entire 12-month contract. You choose which option during the application.
3. Broadband's 'free' for the 12-month contract. If you stay after the contract it's £9.99/mth or £17.49/mth depending on where you live, so diarise to switch at this point.
4. £80 cashback - it's sent automatically. Ensure you use the link above and you'll receive a cheque for £80 within 60 days of your broadband activation date.
5. Pay by direct debit. Or there's a £1.50-per-payment extra charge.
You maybe able to get cash back too to reduce this cost further but I am unsure. Good luck and time to switch!