I’ve since found a Spurs fan at work, who went with his Chelsea supporting brother - they went as neutrals.
I wonder how many people attend as neutrals? Might account for those who sit, don’t react to anything, look uninterested and leave early?
Like watching it on Sky, I guess.
None around me. But definitely noticed a few plain clothed ones further down taking pictures of United players whenever they came close. Probably come all the way from Hassocks.