This is the one question about VAR that annoyed me the most because they are (meant to be) checking every possible red card, penalty decision and the build-up of each goal - just because we don't see it, it doesn't mean it didn't happen. That obviously went out of the window with the Pickford incident today though, although there are some mitigating circumstances. They probably got caught up with the offside call and keepers tend to have free rein to do what they like these days. I'd say it's 99.9999% they checked the Walker incident just then.