4 Mark Construction (London) Ltd

57-59 Hatfield Road, Potters Bar, EN6 1HS

152 Sketty Road, Enfield, EN1 3SH

11 Bancroft, Hitchin, SG5 1JQ

255 North Approach, Watford, WD25 0ET

Unit 4, Charlton Mead Lane, Hoddesdon, EN11 0DJ

32 Uplands Pk Road, Enfield, EN2 7PT

42 Clewer Crescent, Harrow, HA3 5PZ

132 Manor Way, Borehamwood, WD6 1QX

4 Durrants House, Gloucester Court, Croxley Green, Rickmansworth, WD3 3FT

Business & Technology Centre, Bessemer Drive, Stevenage, SG1 2DX