Carlisle Sunderland Hartlepool Newcastle upon Tyne Blyth Seaham Stanley Penrith Morpeth Consett Peterlee Galashiels Whitley Bay Berwick-upon-Tweed Kelso Amble Wooler Hexham Hawick Selkirk Byrness Alnwick Jedburgh Brampton Bamburgh Gorebridge Haltwhistle Hott Steel Hepple Elsdon Renwick Kielder Colwell Gilsland Dirt Pot Ninebanks Newbrough Bewcastle DURHAM ALNWICK WANSBECK TYNEDALE CARLISLE EASINGTON GATESHEAD SUNDERLAND HARTLEPOOL SEDGEFIELD DERWENTSIDE WEAR VALLEY BLYTH VALLEY CASTLE MORPETH NORTH TYNESIDE SOUTH TYNESIDE SCOTTISH BORDERS CHESTER-LE-STREET BERWICK-UPON-TWEED NEWCASTLE UPON TYNE The shading indicates the maximum requirements for radon protective measures in any location within each 1-km grid square to satisfy the guidance in Building Regulations Approved Document C. The requirement for an existing building with a valid postal address can be obtained for a small charge from www.ukradon.org . The requirement for a site without a postal address is available through the British Geological Survey GeoReports service, http://shop.bgs.ac.uk/GeoReports/ . Map 20 Northumberland, 100-km grid squares NT and NU (axis numbers are the coordinates of the National Grid) Level of protection required None Basic Full Settlements Newcastle upon Tyne Berwick-upon-Tweed Alnwick Hepple National Grid 100-km 10-km Other Features LOCAL ADMINISTRATIVE DISTRICT Water features Roads Motorways Primary Roads A Roads B Roads 420 380 400 440 580 600 620 560 540 360 640 340 © Crown copyright. All rights reserved [Health Protection Agency][100016969][2007] 660 Radon potential classification © Health Protection Agency and British Geological Survey copyright [2007]