Credit to @grolsch99 and @rkjp for this update:STILL WORKING - Use code SPMPWBYPSY42
Thanks to @Duncancc for getting it checked and finding out the code above will expire 01/01/2020 0:00 (this comment)Terms and conditions
£12.99 Sky Sports Month Pass: Voucher code entitles recipient to a Sky Sports Month Passes for £12.99 (standard price currently £33.99). Available to new and existing NOW TV customers
without a Sky Sports Pass only. Offer price only valid for one month. Once your offer period ends your Sky Sports Month Pass will automatically renew at £33.99 a month unless cancelled. Cancel anytime. You must redeem your voucher by 23.59 on 15 December 2018
to qualify for this offer. Not available to NOW TV Combo customers. You can only have one Sky Sports Pass in your account at any one time. This offer is not available with any other offers. One offer per customer. See nowtv.com
for list of compatible devices. Red button and interactive services are unavailable. All live scheduling may be subject to change.Hope this helps!