A private forecasting company, established in 2012. Primary focus appears to be transport forecasting. Accounts seem to be healthy, but they were owed a fair sum of money (£3.5 million) as at 31/12/2020, but anticipated it being received during 2021. WxCharts is just an NWP viewer, supplied for free usage - probably as an offshoot of other IT work they've had to do to support their business.