![\"Matt](\"https:\/\/ichef.bbci.co.uk\/onesport\/cps\/624\/cpsprodpb\/14731\/production\/_126116738_gettyimages-1332449195.jpg\")
<\/span><\/span>Hosts: <\/strong>Birmingham <\/span>Dates:<\/strong> 28 July to 8 August<\/span><\/td>\n<\/tr>\n| Coverage:<\/strong> Watch live on BBC TV with extra streams on BBC iPlayer, Red Button, BBC Sport website and BBC Sport mobile app; Listen on BBC Radio 5 Live and Sports Extra; live text and clips online.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n | England’s Matt Walls was involved in a terrible crash in which both he and his bike flew into the crowd at track cycling’s Lee Valley VeloPark.<\/span><\/p>\n The 24-year-old Olympic champion was treated in the stands for more than half an hour before being taken to hospital for precautionary checks.<\/span><\/p>\n<\/div>\n Spectators were also injured in the crash, with one taken away in a wheelchair, covered in blood.<\/span><\/p>\n Matt Bostock, of the Isle of Man, was also taken to hospital for tests.<\/span><\/p>\n The rest of the session was abandoned and spectators were asked to leave while Walls was having treatment.<\/span><\/p>\n Walls won omnium gold and madison silver for Team GB at last summer’s Olympic Games in Tokyo.<\/span><\/p>\n Eight riders in total went down in the crash on the last lap of the men’s scratch race qualifying, with medics and coaches rushing to help the cyclists.<\/span><\/p>\n Walls had been trying to avoid riders who had fallen in an incident that began on the entrance to a corner. The stricken pair of New Zealander George Jackson and Australia’s Josh Duffy were sliding up the banking, forcing Walls up on to the barrier and then over it.<\/span><\/p>\n Canadian Derek Gee also surfed the top of the barrier but managed to avoid following Walls into the stands.<\/span><\/p>\n |