@Utajoker I gave my 31 days noticearound 4 days ago and was offered the 10 month discount deal too, logged into my Sky account later on same day and in the my Sky section it says "Stay with Sky and get an exclusive 50% off any TV Bundle for 12 months".
After reading on the forum about getting 60% discount and 100 credited to account after your 31 days have past showing in my Sky , thought I'd chance it on the chat button next to offer Today and say i had 60% off deal and 100 credit showing in my account. They said that was a great deal but was only showing as 60% off and £50 credit in my account from system .
Asked if it included 60% off multi but he couldnt do it as was only on the tv package but he did try to get it reduced but was unable to apply further discount.
So seems like 60% can be had without waiting full 31 days