Born in England, he represents Scotland at international level after qualifying on ancestry grounds.

[3] The following season saw Bayliss play in wins over the Newcastle Falcons[4] and Ospreys[5] during the pool stage of the Anglo-Welsh Cup and on 30 March 2018 he started in the final of the competition as Bath were defeated by Exeter Chiefs to finish runners up.

[6] In March 2024, having made 110 appearances for Bath he signed a new three-year contract with the club.

[7] Bayliss was a member of the England under-20 side that completed the grand slam during the 2017 Six Nations Under 20s Championship[8] and later that year came off the bench as England lost to New Zealand in the final of the 2017 World Rugby Under 20 Championship to finish runners up.

[9] Bayliss was called up to the Scotland squad for the 2021 Six Nations Championship, qualifying through his Aberdonian grandmother.