Issues around the Circuit of Wales explained in 90 seconds

Plans to build a £325m motor racing circuit in the south Wales valleys have gone to a public inquiry.

The eight-day hearing in Ebbw Vale will examine the request to take over 250 hectares (600 acres) of common land.

Backers including Blaenau Gwent council have offered around 320 hectares (800 acres) of land to replace it.

BBC News looks at the plans and potential problems - in 90 seconds.

Video produced by Paul Heaney.