West Island School rugby team are in the Grade A championship final for a third consecutive year after a solid first half performance helped secure a 20-10 triumph against South Island School on Tuesday. West, champions in 2000, can put to rest its disappointment of last year's final defeat to Island School if they beat King George V School (KGV) at Happy Valley next Tuesday. West defeated KGV 17-0 in the round-robin stage earlier this month. A first-half try from West's Doyen Chung and a cleanly struck penalty kick from Nick Sterling paved the way to victory. The contest could have been over early in the second half when West's Brad Wayburne ran in a try to make it 13-0, but the score seemed to inflame South's spirit. Only great tackling from speedy Wayburne prevented a quick South response. But South continued the pressure and were rewarded with tries from Jamie Lunty and Matt Lynd. Had both tries been converted, South would have taken the lead. West then stepped up a gear and sealed the win with a try from Alex Davey which Sterling converted. But West's Most Valuable Player of the game James Lewis said his team had under-performed and would iron out errors prior to the big match with KGV on Tuesday. 'We must play together and practise more - it is a problem,' said James. KGV clinched their place in the title decider when they defeated Hong Kong International School 27-12 at Tai Hang Tung Sports Ground. SIS will battle HKIS for third place there, also on Tuesday.