Staffordshire

Anne and her husband, Vice Admiral Sir Tim Laurence, joined servicemen and women at the National Memorial Arboretum in Staffordshire.

A gas called hydrogen sulphide emanates from Walleys Quarry in Newcastle-under-Lyme. Thousands have reported the "nauseating" fumes to the Environment Agency.

The Independent Office for Police Conduct said the investigation was "still in its very early stages".