NHSCovid tests are now being sold illegally online for up to £400 a box, a new probe has discovered. Boxes of the 15-minute lateral flow test were found by The Mirror on multiple online markets.The tests are being sold for between £45 to £400 on Facebook, eBay and Gumtree.The NHS tests which have been created Innova are thought to be stolen from the UK supply chain.The Mirror discovered the tests had been stolen due to their unique lot numbers.The Mirror understands around a dozen codes correspond to batches sent to the Department of Health last October and November under contracts with the drugs firm worth £829million.It is not known how many kits were stolen – or from where in the supply chain.The Innova kits were used in the first mass.