Isleworth residents are making a stand against proposed plans to develop the Campion House site into homes.

The group, called Campion Concerns, is worried about the density of the 340 housing units, which were on show at a public exhibition in November.

Campion House in Thornbury Road was a Catholic seminary run by the Jesuits until 2004, when falling numbers of recruits for the priesthood led them to close and sell the site to developers Try Homes.

The area was also named as a conservation area by Hounslow Council in 2002.

David Pavett, one of the founders of Campion Concerns, insists the group does not want to stop the development but wants to ensure it stays within planning guidelines.

He said: "We believe that the proposal for a development of 340 housing units far exceeds the recommended density for this site. "Such a high density would have a very negative impact on the area and we hope the council planning department will help us to resist it."

Try Homes, which is hoping to submit its formal planning application in four to six weeks, employed consultancy company Green Issues Communications to facilitate discussions with local residents.

Green Issues carried out two evenings of workshops prior to the exhibition to gain a clearer understanding of what local residents' aspirations and concerns were regarding the proposed scheme.

Out of 76 feedback forms returned from residents, Green Issues produced a report stating that 83 per cent were positive about the development.

More than 800 residents were invited to the workshops and more than 2,200 residents attended the exhibition.

Tom Nicholson, managing director of Try Homes Thames Valley, said: "I came away very positive because the majority of people accepted that there's going to be a redevelopment, liked the way we were talking to people and the way the architect had come up with a very attractive design solution.

"I would strongly argue that the majority of people are supportive and complementary about the proposal."

But Campion Concerns said the consultation was a farce which did not represent residents' views.

The group has had extensive correspondence with both Try Homes and Green Issues and sent a letter signed by 110 local residents outlining its major concerns to the developers on February 6.

Mr Pavett said: "We only had time to canvas a few streets but the response was amazing.

"Virtually everyone wanted to sign. If there is anyone in favour of the proposed development then they are very hard to find."

Campion Concerns is keeping the councillors for Osterley and Spring Grove ward informed of its actions.

Councillor Barbara Reid highlighted concerns with losing open space, traffic, parking and the impact on local services such as health, schools and public transport.

She said Campion Concerns was doing an "amazing job" and everybody was working to get a development that would enhance the area.

But Mr Nicholson maintained Try Homes had listened to residents and the number of dwellings would certainly be below the 340 proposed at the exhibition.

He said: "We are looking to provide a sustainable development that will be suitable for the site. I can't say we will do everything that everybody wants but the scheme will come out of the conversations we've had with residents in forums with other groups like Campion Concerns."