A NEW group of residents is fighting the threat of a powerful emergency service TETRA mast being installed on a Jurassic Coast World Heritage Site. Residents of Stonebarrow in Charmouth will have an emergency meeting today to discuss what they believe is the impending arrival of a TETRA mast just yards from their homes and on the official coast path in full view of the Jurassic Coast. And the shadow chancellor and MP for west Dorset, Oliver Letwin, has pledged his support for their campaign to save the beauty spot. Terry and Barbara Collins, of Stonebarrow Lane, called the meeting after they spotted engineers from BT attaching wires to their telegraph pole last weekend. They challenged the engineers who allegedly told them that the wires were for a new TETRA mast. Mrs Collins said: "If they get a mast up here, being in full view of the fossil beach, the world heritage site, an Area of Outstanding Natural Beauty, the gateway to Golden Cap - there's even a home for rare bats - who knows where they will put them next." Mrs Collins said Stonebarrow residents worked alongside MP Oliver Letwin in 2002 to ensure a TETRA mast in the pro tected area was blocked. A telephone mast already exists on the site, but resi dents had been assured that a bigger TETRA mast would not be erected. A letter from West Dorset District Council's chief planning officer, Douglas Greenslade, to Oliver Letwin said at the time that the site was "no longer required by BT Airwave". So was this, asked Mrs Collins this week, a quick fix after a TETRA mast caused so much objection at Lyme Regis golf club earlier this year? Oliver Letwin this week pledged his support for the Stonebarrow residents' campaign. He said: "It is disappointing that they are reviewing this. I still think it is a totally unsuitable site and we shall now have to start the campaign again." He said he did not dispute the need for the TETRA system, but felt such a sensi tive site was the wrong place to put a mast. Kevin Perry, senior enforcement officer at West Dorset District Council, said the council was investigating the proposed new mast. He said unless permitted development rights had been blocked on the site, Airwave would be within its rights to erect a TETRA mast for up to six months. No one from Airwave was available for comment. TETRA stands for Terrestrial Trunked Radio and is a sophisticated communica tions system for the emergency and other public safety services. Maker MMO2 says TETRA will help make Britain safer, by allowing more effective and efficient policing, and offers the opportunity for joined up public safety services. The system is being provided to all police forces throughout England, Scotland and Wales as part of a £2.9bn government contract. Protesters believe TETRA endangers the people who live and work near masts and say the tech nology is even more dangerous than that of mobile phone masts due to the pulse rate of the signal.