• B W Services Ltd
  ST. James Road, Goffs Oak, WALTHAM CROSS, Hertfordshire, EN7 6TR
• Brian Boatwright
  Homewood, Bedmond Road, ABBOTS LANGLEY, Hertfordshire, WD5 0RS
• D G Contractors
  Keepers Cottage, Beaumont Road, BROXBOURNE, Hertfordshire, EN10 7QJ
• Emperor Construction
  42 Adeyfield Gardens, HEMEL HEMPSTEAD, Hertfordshire, HP2 5JY
• G Difato
  Hoe Lane, Nazeing, WALTHAM ABBEY, Essex, EN9 2RJ
• Laurel Bank Farm
  St James Road, Cheshunt, WALTHAM CROSS, Hertfordshire, EN7 6TR
• Michael Lydon & Co Ltd
  28 High Street, NORTHWOOD, Middlesex, HA6 1BN
• PGSD Ltd
  Ivy Road, HOUNSLOW, Middlesex, TW3 2DH
• R & A.R Hoyle
  Princes Gate Farm, Navestockside, BRENTWOOD, Essex, CM14 5SH
• R Hoyle
  Princes Gate Farm, Navestockside, BRENTWOOD, Essex, CM14 5SH
• R.F Sinclair & Sons
  Tollgate Farm, Tollgate Road, Colney Heath, ST ALBANS, Hertfordshire, AL4 0NY
• William H Helm
  Sloemans Farm, Whitewebbs Road, ENFIELD, Middlesex, EN2 9HW