Can't see anything in the NOTAM that says flights won't be handled? PPR doesn't seem an excessive request.
Meanwhile down the road at Stansted Harrods are open 24/7, as is Luton. I assume the demand just isn't there to justify extending the normal operating hours but then with 8 to 4 standard operating hours I can't see that being very attractive. Reminds me of a couple of years ago when Easyjet arrived late back into SEN. Sometimes they got in and sometimes they ended up at Stansted.