Gerboles, M*; Buzica, D*; Brown, R J C; Yardley, R E; Hanus-Illnar, A*; Salfinger, M*; Vallant, B*; Adriaenssens, E*; Claeys, N*; Roekens, E*; Sega, K*; Jurasovic, J*; Rychlik, S*; Rabinak, E*; Tanet, G*; Passarella, R*; Pedroni, V*; Karlsson, V*; Alleman, L*; Pfeffer, U*; Gladtke, D*; Olschewski, A*; O'Leary, B*; O'Dwyer, M*; Pockeviciute, D*; Biel-Cwikowska, J*; Tursic, J* (2011) Interlaboratory comparison exercise for the determination of As, Cd, Ni and Pb in PM10 in Europe. Atmos. Environ., 45 (20). pp. 3488-3499.

Derwent, R*; Witham, C*; Redington, A*; Jenkin, M*; Stedman, J*; Yardley, R E; Hayman, G (2009) Particulate matter at a rural location in southern England during 2006: Model sensitivities to precursor emissions. Atmos. Environ., 43 (3). pp. 689-696.

Hayman, G; Yardley, R E; Quincey, P; Butterfield, D M; Green, D*; Alexander, J*; Johnson, P*; Tremper, A* (2008) CPEA 28: Airborne Particulate Concentrations and Numbers in the United Kingdom (phase 2): Annual Report - 2007. NPL Report. AS 25

Butterfield, D M; Yardley, R E; Hughey, P; Lipscombe, R (2008) 2007 annual report for the UK Black Smoke Network. NPL Report. AS 22

Brown, R J C; Butterfield, D M; Goddard, S L; Muhunthan, D; Williams, M; Yardley, R E (2008) Annual Report for 2007 on the UK Heavy Metals Monitoring Network. NPL Report. AS 20

Muhunthan, D; Yardley, R E; Butterfield, D M (2008) Report on the organic carbon/elemental carbon (OC/EC) and anion analysis of filter PM samples from Auchencorth Moss. NPL Report. AS 21

Brown, R J C; Yardley, R E; Muhunthan, D; Butterfield, D M; Williams, M; Woods, P T; Brown, A S; Goddard, S L (2008) Twenty-five years of nationwide ambient metals measurement in the United Kingdom: concentration levels and trends. Environ. Monit. Assess., 142 (1-3). pp. 127-140.

Brown, R J C; Goddard, S L; Brown, A S; Yardley, R E (2008) The effect of isotopic composition on the uncertainty of routine metal mass concentration measurements in ambient air. J. Auto. Methods Manage. Chem.. 504092

Brown, R J C; Brown, A S; Yardley, R E; Corns, W T*, Stockwell (2008) A practical uncertainty budget for ambient mercury vapour measurement. Atmos. Environ., 42 (10). pp. 2504-2517.

Yardley, R E; Butterfield, D M (2007) CPEA 28: airborne particulate concentrations and numbers in the United Kingdom (phase 2). Annual audit report. NPL Report. AS 16

Butterfield, D M; Quincey, P; Yardley, R E; Hughey, P; Lipscombe, R (2007) 2006 Annual report for the UK Black Smoke Network. NPL Report. AS 2

Yardley, R E; Quincey, P; Butterfield, D M; Green, D*; Alexander, J*; Johnson, P*; Tremper, A* (2007) CPEA 28: Airborne particulate concentrations and numbers in the United Kindom (phase 2). NPL Report. AS 4

Yardley, R E; Sweeney, B P; Butterfield, D M; Quincey, P; Fuller, G*; Green, D* (2007) CPEA 28: airborne particulate concentrations and numbers in the United Kingdom (phase 2). Estimation of measurement uncertainty in network data. NPL Report. DQL-AS 037

Brown, R J C; Williams, M; Butterfield, D M; Yardley, R E; Muhunthan, D; Goddard, S L (2007) Report to the Department of Environment, Food and Rural Affairs by the National Physical Laboratory: annual report for 2006 on UK Heavy Metals Monitoring Network. NPL Report. DQL-AS 036

Butterfield, D M; Yardley, R E; Quincey, P G; Green, D* (2007) Comparison of methods for organic and elemental carbon PM10 concentrations at Marylebone Road for the period 07/09/06 to 31/12/06. NPL Report. DQL-AS 035

Sweeney, B P; Yardley, R E; Butterfield, D M (2006) CPEA 28: airborne particulate concentrations and numbers in the United Kingdon (phase 2) - annual. NPL Report. DQL-AS 031

Yardley, R E; Quincey, P; Butterfield, D M; Williams, M; Green, D*; Johnson, P*; Tremper, A* (2006) CPEA 28: airborne particulate concentrations and numbers in the United Kingdon (phase 2). Annual report 2005. NPL Report. DQL-AS 028

Brown, R J C; Williams, M; Butterfield, D M; Yardley, R E; Muhunthan, D; Woods, P T (2006) Annual report for 2005 on the UK Heavy Metals Network. NPL Report. DQL-AS 026

Brown, R J C; Harrision, N J; Brown, A S; Yardley, R E; Velummylum, D (2006) Report to the Department of Environment, Food and Rural Affairs by the National Physical Laboratory: annual report for 2004 on the UK Heavy Metals Network. NPL Report. DQL-AS 024

Brown, R J C; Yardley, R E; Brown, A S; Edwards, P R; Rivier, C*; Yardin, C* (2006) Analytical methodologies with very low blank levels: implications for practical and empirical evaluations of the limit of detection. Analytical Letters, 39 (6). pp. 1229-1241.

Brown, R J C; Wang, J; Tantra, R; Yardley, R E; Milton, M J T (2006) Electromagnetic modelling of Raman enhancement from nanoscale substrates: a route to estimation of the magnitude of the chemical enhancement mechanism in SERS. Faraday Discuss., 132. pp. 201-213.

Brown, A S; Yardley, R E; Quincey, P G; Butterfield, D M (2006) Studies of the effect of humidity and other factors on some different filter materials used for gavimetric measurements of ambient particulate matter. Atmos. Environ., 40. pp. 4670-4678.

Brown, A S; Yardley, R E; Quincey, P G; Butterfield, D M (2005) Ambient air particulate matter: quantifying errors in gravimetric measurements. NPL Report. DQL-AS 015

Brown, R J C; Milton, M J T; Yardley, R E; Brown, A S; Rivier, C*; Yardin, C* (2005) Analytical methodologies with very low blank levels: implications for practical and empirical evaluations of the limit of detection. NPL Report. DQL-AS 014

Schiffmann, D; Butterfield, D M; Yardley, R E; Knight, A; Windsor, S A; Jones, C* (2004) Val-CiD Appendix A: CD spectroscopy: an inter-laboratory study. NPL Report. DQL-AS 009

Jones, C*; Knight, A; Llordés, A B*; Marrington, R*; Rodger, A*; Schiffmann, D; Vives, O C*; Windsor, S A; Yardley, R E (2004) Val-CiD Appendix B: the use of chemical calibrants in circular dichroism spectrometers. NPL Report. DQL-AS 010

Brown, R J C; Yardley, R E; Brown, A S; Milton, M J T (2004) Sample matrix and critical interference effects on the recovery and accuracy of concentration measurements of arsenic in ambient particulate samples using Inductive Coupled Plasma Mass Spectrometry (ICP-MS). Journal of Analytical Atomic Spectroscopy, 19. pp. 703-705.

Brown, R J C; Yardley, R E; Brown, A S; Milton, M J T (2003) Inter-laboratory study of the measurement of Ni, As, Cd and Pb contents of ambient air. NPL Report. COAM 20