E4 now on sale to home supporters.
The match is likely to be close to a sell-out on the day, as the two teams come face to face for the first time in five years, after the Shrimpers returned from League Two via the play-offs at the end of last season.
With sales going well for U's fans, the club have now released block E4 in the East Stand for home sales, providing another 400 tickets with family friendly pricing ahead of the festive fixture.
If you're thinking of coming to the game, grab your tickets this weekend, as from next week, the prices move to the Saver price band.
What's more, if you're a South Stand supporter, then grab your tickets quickly, as there are only 220 tickets left in the popular home end!