I contacted Sky yesterday (via livechat) to find out when my broadband contract was due to expire. With 45 days left on my contract, they agreed to reduce the price of my line rental to £7.40 per month (instead of £17.40) and continue my £10 per month for unlimited fibre broadband (effectively £17.40 per month). I don't know if you'll need to put this but I said I was looking at PlusNet and they charge...
£15.49 per month for the first 12 months (£185.88 - Line Rental Saver).
£17.99 per month for the last 6 months of the 18 month contract.
£5.00 per month for broadband.
All this works out on average at £21.32 per month.
The livechat advisor spoke to his manager to confirm the deal and I signed up to a new 12 month contract, starting from yesterday. Happy days!