Vern Cotter has brought two additional players into his Scotland squad as injury cover for the autumn internationals. The Glasgow centre Peter Horne and the uncapped Edinburgh scrum-half Sam Hidalgo-Clyne have been called up because of doubts over Alex Dunbar and Chris Cusiter.

Dunbar reported ankle discomfort during Glasgow’s 15-13 win over Montpellier in the European Champions Cup on Saturday, while a calf strain kept Cusiter out as Sale slumped to their second successive defeat in the competition – 35-3 at Clermont.

Scotland’s medical team will now examine the pair to see if they can feature next month, but in the meantime Horne and Hidalgo-Clyne will join the rest of the squad at their three-day training camp at Royal Grammar School, Newcastle.

While most of the squad arrived at the training base, which will also be used by Scotland during next year’s World Cup, on Sunday night, the Glasgow wings Tommy Seymour and Sean Maitland linked up with the rest of the players on Monday morning.

Scottish Rugby reported that they both suffered “concussive episodes” after picking up head knocks during Glasgow’s win and were told to rest at home before beginning return-to-play protocols when they arrived on Tyneside.

Scotland face Argentina in their first autumn Test at Murrayfield on 8 November, before testing themselves against New Zealand at the same venue a week later and finishing against Tonga on 22 November at Rugby Park, Kilmarnock.