It’s not just top bank executives or hedge fund managers who have lost their jobs or changed roles during the past few months’ turmoil. Some of the rugby world's biggest stars who have made high-profile moves into banking have also taken new positions.

Most recent among the moves is Thomas Castaignède, the mercurial former fly-half and fullback in the French national rugby team, who this month switched from the fixed income sales team at UBS to interdealer-broker Icap.