England U20 and England XV White, who represented England at U17's, featured for England U18-s in all of their 2016 Six Nations matches in 2016. On 3 January 2018 White was named in
England under-20s squad for the 2018 U-20s Six Nations Championship, and he captained England under-20s. White started for England under-20s in the 2018 Rugby World Cup Final against France, having started the semi-final against South Africa and being involved in every Pool game. After a breakthrough year for Leicester in 2018–19, White was named in a squad for an uncapped match against the
Barbarians.
Scotland White qualifies for Scotland through having a Scottish grandfather. In January 2022 White was named in the
Scotland squad for the 2022
6 Nations Championship. White was named as a replacement for Scotland's opening game of the Six Nations against . Due to his form with London Irish during the 2022/23 English Premiership, he was selected as starting scrum-half for the Scotland team which won a third consecutive Calcutta Cup and a second away win at Twickenham in the opening round of the 2023 Guinness Six Nations. In 2023 White was selected in Scotland's 33 player squad for the
2023 Rugby World Cup in France.
British & Irish Lions White was called up to the
2025 British & Irish Lions tour to Australia as a replacement for the injured
Tomos Williams. He made his debut in the third tour match in Australia, a 10-21 victory over
NSW Waratahs, becoming Lion #883. == Career statistics ==