RE: Historical question15 Apr 2019 11:06
According to SCSW; "Dialight, Originally known as Roxboro, used to have a range of businesses including Solartron (oil and gas instrumentation) and Weston (thermocouples for the aerospace industry) but in around 2006, the company sold those and returned a huge slug of cash to shareholders". Hence (I assume) the large fall in share price.