Yeah, we can split hairs and do the
1) those that helped and planned
2) those who's lucky number was drawn to go
3) those that physically went into the tunnels
4) those that made it out the other end
5) those that were executed
6) those that were recaptured
7) those that made a clean getaway
Were they involved in, or did they escape. Were they security or did they dig. Who cares. Many helped, and a lucky few were chosen and a small number went out. Big deal. It was a team effort by men from several nations. Not just the brits.