New customers can currently receive a £100 M&S voucher when they sign up to Sky's Unlimited Broadband and calls package.
Those who sign up for a 12-month contract receive up to 17 Mb broadband, with no usage caps whatsoever.
They also receive a free Sky Hub wireless router, unlimited Sky Wi-Fi on-the-go, and for a limited time can also receive a £100 M&S voucher to spend in store and online at the retailer, whenever they please.
Furthermore, the package is totally free - all customers need to do is pay £16.40 line rental per month and commit to a 12-month contract.
Those who want TV with their package can also add the Original Bundle, which comes with 35 premium channels, on-demand streaming, a free Sky+HD Box, and £75 credit off the first bill, for an extra £19.88 a month.