Have you noticed that many of the armed forces act as ushers at Wimbledon?

I am lucky enough to get tickets for Wimbledon most years. There are lots of soldiers, sailors, air force, fire brigade personnel there, all volunteers who 'police' the ticket holders in the show courts (checking their tickets, showing them where their seats are, dealing with people who faint, and a hundred other things. They often have little to do whilst the games are actually in progress, and have a lot to do when the players change ends. It may be you have seen one of these volunteers having a seat in one of the spare seats and watching a game