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National Physical Laboratory<br />
Hampton Road<br />
Teddington<br />
Middlesex<br />
TW11 0LW<br />
44 (0) 20 8943 6121<br />
44 (0) 20 8943 6755<br />
melanie.williams@npl.co.uk<br />
www.npl.co.uk/environment<br />
Melanie Williams<br />
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NNC Ltd<br />
Booths Hall<br />
Chelford Road<br />
Knutsford<br />
Cheshire<br />
WA16 8QZ<br />
44 (0) 1565 633800<br />
44 (0) 1565 633659<br />
marketing@nnc.co.uk<br />
www.nnc.co.uk<br />
Lorraine Sinclair<br />
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Norec Ltd<br />
Norec House<br />
Fallbank<br />
Dodworth<br />
Barnsley<br />
South Yorkshire<br />
S75 3LS<br />
44 (0) 1226 730440<br />
44 (0) 1226 730688<br />
Andrew.howells@norec.ltd.uk<br />
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A. W. Howells<br />
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