Block Paving Driveways North Marston, Milton KeynesNorth Marston by JSM Driveways - May 24, 20180 Block paving driveway contractors in North Marston, Milton Keynes. JSM contractors are your block paving company of choice. Over 20 years experience at installing driveway paving, patio paving, block paved pathways and garden areas. Our team work to industry approved standards. Professional, registered block paving options in North Marston.