With rugby union turning professional, Tait along with many other converts switched codes back to union in 1996, signing for the
Newcastle Falcons. They won the Premiership in 1998, with Tait making 19 appearances that season. At first he was ignored by the Scotland selectors but eventually made his return for Scotland after a nine-year absence in 1997 and went on to represent the British & Irish Lions in South Africa in the summer of that year. Surprising many Tait was selected to start the first two Tests on the wing, even though his favoured and more recognised position was at centre. This was due to coach
Ian McGeechan believing that Tait would add extra defensive capabilities to the backline over the other wingers, in what would be a tight test series. He scored a try in the first match as the Lions won 25–16 in Cape Town. He also played in the second match which saw the Lions clinch the series after a dramatic 18–15 victory in Durban. Injured before the 3rd Test he did not play as the Lions lost the last match 35–16. For Scotland Tait developed a partnership with
John Leslie. The
1999 Five Nations Championship culminated in Scotland narrowly finished ahead of England on points difference thanks to Wales' last minute victory over England at Wembley. Tait scored two tries in Scotland's last match of the tournament as they beat France 36–22. Later that year he represented Scotland for the last time at the 1999 World Cup, finishing with a defeat by New Zealand. He scored a try against South Africa in the pool stages at Murrayfield in a 46–29 loss to the holders. In 2000 Tait retired from professional rugby, playing for
Edinburgh Reivers. In all Tait played 27 times for Scotland, scoring 17 tries. ==Coaching==