1981 – 1986 Company name Sylva Autokits Place Milford-On-Sea, Milford-on-Sea, Hampshire Country United Kingdom
1992 – 1992 Company name JP Autocraft Place Stourport-On-Severn, Stourport-on-Severn, Worcestershire Country United Kingdom
2008 – today Company name Rob Johnston Chassis Fabrication Place Newcastle-Under-Lyme, Newcastle-under-Lyme, Staffordshire Country United Kingdom
2016 – 2017 Company name Sylva Sports Cars Place Kirkby Mallory, Leicestershire Country United Kingdom
