Campaigners against plans to build a number of eco-towns will march on parliament today as one leading conservation group urged the Government to "go back to the drawing board".

The Campaign to Protect Rural England (CPRE) said many of the 15 shortlisted schemes were recycled conventional development and there was a "worrying lack of evidence" they would offer sustainable lifestyles.

The CPRE voiced its concerns as campaigners against nine of the proposals headed to London today to protest against plans and present a petition against them at Downing Street.

Groups included villagers opposed to the Weston Otmoor plan, who yesterday were shown an outline of the scheme at an open day.