Scotland captain Sione Tuipulotu has been ruled out of the 2025 Six Nations after suffering a pectoral muscle injury.
Scotland have called up uncapped Saracens fly-half Fergus Burke to their squad for the Six Nations.
Simon Easterby has named his first squad as he takes charge of Ireland's Six Nations defence while Andy Farrell leads the British and Irish Lions.
Maro Itoje has replaced Jamie George as England captain ahead of their upcoming Six Nations campaign.
Tom Willis and Max Ojomoh could be in line for England call-ups for their Six Nations opener against Ireland, with Ojomoh in line for a Test debut.
Warren Gatland will remain as Wales head coach for the 2025 Six Nations - but has been warned that results must improve.