In the 1970–71 series in Australia he was instrumental in England regaining The Ashes, taking five catches and stumping Doug Walters in the decisive Seventh Test in Sydney.
Although he didn't take any catches in the match, he did make a single stumping, stumping Jeff Crowe off the bowling of Steve Plumb.
In the game against the Pakistanis, his most notable achievement was his second-innings stumping of opener and captain Hanif Mohammad.
In the final week of the campaign, DFL Lieutenant Governor candidate Judi Dutcher was stumping for her running mate Mike Hatch.
He retained his place for the County Championship game against Lancashire that followed, in which he achieved his first stumping, accounting for Farokh Engineer off the bowling of Norman Gifford.
Trocard made two stumpings in this match, while with the bat he scored 17 runs before being run out by Clifford Walwyn.