Glasgow Warriors hooker Dougie Hall has been called up for today’s Scotland training session in preparation for the start of the 2008 RBS 6 Nations Championship next month.Hadden enlisted Hall following the Warriors away win over Viadana in the Heineken Cup.Scotland’s most capped player, Scott Murray, was also called up as well as props_Bruce Douglas_and Craig Smith.The Warriors’_Scotland players will return to_Glasgow tomorrow to continue preperations ahead of their crunch match against Saracens at Firhill Arena.The game kicks-off at 8pm and the Warriors will have to top their group to proceed to the knock-out stages.Tickets for Friday’s game are priced at _15 for adults and _5 for concessions (including under 18s, students and OAPs).To avoid long queues at the Ticket Centre on Friday night, supporters are encouraged to book in advance by clicking here or by calling the Ticket Centre on 0844 800 3490.Click here to check out how things stand following last weekends round 5 fixtures.