[1] In October 2018 Dingwall made his professional debut for Northampton in a Premiership game against Leicester Tigers.
[5] In January 2023 Dingwall was suspended for three weeks following his sending-off for dangerous play in a Champions Cup match against La Rochelle.
[7] Dingwall scored a try for the England under-20 team against Ireland in the final round of the 2018 Six Nations Under 20s Championship as they finished runners up.
[8] He was included in the squad for the 2018 World Rugby Under 20 Championship[9] and started in the final as England finished runners up to hosts France.
[13] On the 17th January 2024 Dingwall was called up to the senior England squad for the 2024 Six Nations, along with 6 of his Northampton Saints teammates and made his debut starting at inside centre in a win against Italy.