For the last time people, teams are required to play an international game every 8 years. Teams can play more if they want to, but 8 years is the biggest allowed gap between international games. The Bills waited as long as they could. And if they add two more games in Spain, that will probably drop to 6 years. Also, the Bills were the only team to sustain significant injuries on that crap turf in London. It was really just bad luck. Milano's injury was caused by getting rolled up on and Jones' was a pec injury. The turf and/or the travel played no role in either.