Scotland coach Vern Cotter makes four changes for historic Tonga Test

• Geoff Cross, Johnnie Beattie and Sean Lamont selected• First major international to be played on synthetic pitchInjuries have forced the Scotland coach, Vern Cotter, into four changes to his side ahead of Saturday’s historic clash with Tonga at Rugby Park. The home of the Scottish Premiership football side Kilmarnock will host the first ever major Test to be played on a synthetic pitch.The tighthead prop Geoff Cross and No8 Johnnie Beattie come into the pack for Euan Murray and Adam Ashe, who miss out through thigh and neck injuries respectively. In the backs Sean Lamont, who came on in the …