From time to time the entry and exits are closed either NB or SB...If you want to use the back roads this will take you in... Die hards will do this for vouchers etc., personally I use another services but hey ho...
come off at Junction 30 and right onto the A616 then A619, follow this till you reach the A618 and left up that...follow this till you come under the M1 and a no entry will appear to your right...This is your entry through the service road into Woodall
If you are heading further North, come back out the service road and when you reach the no entry from before you are TURNING right onto the A618.....You follow this upto the A57 which will bring you on junction 31 of the M1....comninng South reverse all this...