Owing to the 1986 Tour to South Africa being cancelled for political reasons, the Lions played a one-off Test match versus a Rest of the World XV in the Welsh capital, as part of the then IRFB (now World Rugby) centenary celebrations.
This match was officially recognised as a Lions fixture and all players in the match were allocated a Lions player number. In 2018 they were also awarded caps as part of the 1888 Club, alongside all other Lions players.
The Lions were managed by the great Clive Rowlands, coached by Mick Doyle and captained by Colin Deans.
The Test took place on a Wednesday in April at Cardiff Arms Park, only the second time in the venerable history of the Lions that they played on home soil.
21 players were selected for the clash against a mouth-watering World XV.
Their backline included Wallaby stars on the rise Michael Lynagh and Nick Farr-Jones, French masters Serge Blanco and Patrice Estève with Wayne Smith pulling the strings at No.10.
The power of Simon Poidevin and Murray Mexted up front made them a serious opposition.
But the Lions were packed with class acts as well.
The emerging Gavin Hastings would play full back with Rory Underwood on one wing and Trevor Ringland on the other.
Brendan Mullin and John Devereux were in midfield while John Rutherford and Rob Jones formed the half-back pairing.
Deans skippered from hooker either side of Jeff Whitefoot and Des Fitzgerald while Donal Lenihan and Wade Dooley made up the second row.
In the back row John Beattie and John Jeffrey dovetailed with Nigel Carr.