Map 8 Cambridgeshire and Hertfordshire, 100-Km Grid Square TL (Axis Numbers Are the Coordinates of the National Grid) © Crown Copyright

Home , Chelmsford, East Cambridgeshire, South Cambridgeshire

Dereham Wisbech KING'S LYNN AND WEST NORFOLK Stamford RUTLAND Upwell CITY OF PETERBOROUGH 0 Wretton BRECKLAND 0

3 Peterborough March Methwold

Doddington

EAST NORTHAMPTONSHIRE Thetford Ely

0 Clopton

8 Kettering 2 Colne EAST CAMBRIDGESHIRE HUNTINGDONSHIRE FOREST HEATH St Ives Mildenhall Huntingdon Rushden Newmarket Bury St Edmunds Riseley St Neots 0

6 Cambridge Stowmarket 2 Rede Carlton BEDFORD Carlton Bedford SOUTH CAMBRIDGESHIRE Haverhill Biggleswade Acton Newport Pagnell Wixoe Royston Sudbury 0 BABERGH 4 Saffron Walden 2 MID BEDFORDSHIRE

Letchworth Meesden

BRAINTREE Stevenage UTTLESFORD Colchester SOUTH BEDFORDSHIRE Coggeshall Luton Little Dunmow

0 EAST HERTFORDSHIRE 2 2 Welwyn

Harlow St Albans DACORUM WELWYN HATFIELD Moreton Chelmsford Hemel Hempstead Northaw CHELMSFORD MALDON BROXBOURNE EPPING FOREST 0

0 WATFORD 2 HERTSMERE CHILTERN Watford Hullbridge High Wycombe ENFIELD Chigwell BRENTWOOD BARNET Brentwood Basildon ROCHFORD HARROW BASILDON HILLINGDON HARINGEY REDBRIDGE Southend-on-Sea HAVERING SOUTH BUCKS BRENT CAMDEN HACKNEY BARKING CASTLE POINT 500 520 540 560 580 600 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/.

Level of protection required Settlements Roads National Grid

None St Albans Motorways 100-km 10-km

Basic Primary Roads Other Features Sudbury Full A Roads LOCAL ADMINISTRATIVE DISTRICT Brandon B Roads Water features Holme

Map 8 Cambridgeshire and Hertfordshire, 100-km grid square TL (axis numbers are the coordinates of the National Grid) © Crown copyright. All rights reserved [Health Protection Agency][100016969][2007] Radon potential classification © Health Protection Agency and British Geological Survey copyright [2007]