yellow = caution
red = dismissal
in the first three group matches, if a player gets a yellow card in 2 of the 3 games he has to miss the next game as a suspension.
if a player gets two yellow cards (cautions) in one game, he gets an immediate red and sent off.
after the first group stages, the cards are cleared, so everyone starts fresh. unless you have picked up a suspension from the group stages which carries over.
if one of those england players on a card had been booked again today, they would have missed the next game.