A rivalry as old as the game itself – but a few players have crossed the divide down the years.
1. Ross Moriarty
The hulking back-rower, whose father is former Wales international Paul Moriarty, initially played for England at both U18 and U20 level, winning the IRB Junior World Championship in 2014. However, he has since made his full international debut for Wales and has since won 25 caps while also representing the British & Irish Lions during their tour of New Zealand in 2017.