English Heritage has dealt a blow to opponents of the planned extension to Corsham’s historic almshouses by saying that it does not have any objections to the idea.

Campaigners from the Corsham Civic Society, who rustled up a 1,000-strong petition against the plan to build nine new apartments on the site at Pound Pill, had hoped that the charity would recommend refusal of the application.

Anne Lock, president of the society, said: “I am in disbelief that the body responsible for the protecting our heritage is unwilling or unable to do so.

“It is most surprising because their view goes against their own guidance which says that a change to the setting of a Grade 1 listed building has to be wholly exceptional.

“The overwhelming number of people we have spoken to don’t think that the scheme is a good idea.”

The existing almshouses were built in 1668 by Lady Margaret Hungerford. They contain tenants who do not pay rent, but contribute to the building’s upkeep.

Isla Macneal, historic buildings inspector for English Heritage, said: “We note that the proposal has been revised to reduce the number of units from 12 to nine.

“There were alterations to the site in the 18th century, especially in the north west section of the building, and these changes show how the building has evolved as well as having their own inherent aesthetic value.

“There does not appear to be any significance to the existing southern boundary of the site.”

A recommendation is expected to be made shortly by a planning officer before the planning application is decided upon by Wiltshire councillors on July 21.