The 33-times-capped wing Webster has passed a fitness test after undergoing intensive rehabilitation on a hamstring problem and will take his place in the squad

Scotland team doctor James Robson said: “Simon passed the test with flying colours and was well-pleased with the progress he’s made.”

Scotland coach Frank Hadden added: “Simon has had a difficult season with injury but is now an experienced internationalist and I’m delighted he is fit to travel.

Meanwhile, Mustchin, who qualifies for Scotland through the IRB’s three year residency requirement, has been introduced to fill one of the three vacancies at lock.

Mustchin joined Edinburgh in 2005 and made his 50th appearance for the team earlier this season

Mustchin said: “Frank signed me for Edinburgh in 2005 and it’s very much home for me and my family. I love the city and I’ve enjoyed my rugby here and being involved in coaching at club level with Murrayfield Wanderers.”

Hadden is asking Glasgow Warriors captain Alastair Kellock and Edinburgh lock Craig Hamilton to attend pre-tour training at Murrayfield next week with two remaining vacancies in the squad still to be filled with a final decision to be made next week.

Hadden is also continuing to monitor closely the possible availability of Scotland’s most-capped player, Scott Murray.

Murray, now with Montauban in France, has two home league matches against Bayonne and Clermont over the next two weekends and has expressed optimism that if both matches are won he may be released for the tour.