Just on the topic of this, there are rumours that Palace are going to do a Corteo all the way up Wembley Way from Wembley Park tube prior to the match. As that's the side of the ground that we're at, I think it's best to pre-warn our fans about it as they could get caught up in it. I'm not saying there will be any trouble or anything - just that it might come as a bit of a surprise to any blues who are around at the time if it does go ahead. Knowing how good Palace are at organising these things, the numbers will be huge.
Looking at those timings on what you've posted, and just to give fans a heads up as to what time this might take place, Covent Garden to Green Park tube is about a 20 minute walk. If the Palace fans are setting off at 1.30pm, they should be on the tube by around 2pm. It's a 22 minute journey from Green Park to Wembley Park so I'd imagine the Palace fans will be dropping on Wembley Way by 2.30pm.
As it happens, I need to be in the ground for 3pm to help with the 1894 display so my plan was to leave Wealdstone FC at 2pm, get on the tube at around 2.15pm, and get to Wembley Park by, errrrr, 2.30pm, so I could end up getting caught up in it myself!