BBC News Published image captionPeople arrive at a mobile unit in Walsall borough Two mobile Covid-19 testing units have been set up in Walsall after the South African variant of the virus was detected in the borough. Walsall Council is also to start delivering testing kits to households towards the end of the week. The authority has advised those aged 18 or above living or working in the WS2 area to take a test once offered, even if they are not showing symptoms. A "steady trickle" of people was reported at one of the units earlier. They are based at Walsall Arena and Arts Centre, on the border of the WS2 postcode area, and Walsall College.