Thames tunnel opponents in last-ditch bid to halt £1.2bn scheme

Campaigners say tunnel will be environmentally destructive and cripplingly expensive

Opponents of a new four-lane tunnel under the River Thames are making a last-ditch attempt to halt the 1.2bn scheme, which they say will be environmentally destructive and cripplingly expensive.

Campaigners are to write to the oversight committee at the Greater London Authority asking it to urgently review the proposal.