A spokesman for Hayes&Jarvis, which offers tours to Borneo, said only one booking had been affected so far. An alternative itinerary was being offered. "Borneo has been increasing in popularity in the past 18 months and one of its key appeals is the wildlife element," it added. Fortunately relatively few of our tour bookings are for the affected areas so we hope that the current situation will not deter potential visitors. The majority of tourists visiting Sabah stay close to Kota Kinabalu, home to the region's main airport, which does not fall within the restricted area. Britons throughout the state should exercise caution, the Foreign Office added, comply with the advice of Malaysian authorities, and monitor local media reports. Its warning comes after the followers of an exiled Filipino sultan landed in Sabah last month, seeking to revive a historical claim to the region.