People are urged to vote so an underused open space can become an attractive park and wetland area.

Boris Johnson’s Big Green Fund will provide grants of up to £175,000 towards environmental projects across London.

A total of seven projects have been shortlisted by the Mayor, including the Stanmore Marsh Restoration scheme in Harrow, which aims to revitalise and improve an underused wetland and green open space.

If the project wins support, more than four hectares will be transformed into an attractive green open space, which will also help prevent flooding through the creation of wetlands to create a natural water storage area.

Mayor of London Boris Johnson said: “There is absolutely no doubt that parks and green spaces in urban areas improve the wellbeing and quality of life of local people and through the Big Green Fund II we look forward to transforming sites across the capital that thousands of residents will enjoy.”

Volunteer groups will be involved at every stage of the project, and it is hoped the green space will benefit all communities and visitors.

Cllr Keith Ferry, who is responsible for business, planning and regeneration, said: “We are pleased to be shortlisted for the Mayors Big Green Fund II. Harrow is already a diverse area with large areas of green open spaces.

“This project will help us to open up underused wetland in Stanmore to members of the public and increase the biodiversity of these wetlands. It will also transform the area into an attractive open space where it can be used for a range of recreational, health and educational purposes.

“If we are successful, the project will not only benefit the residents of Harrow, but it will form part of a wider series of natural flood defences across London.”

Members of the public can decide which projects they like most by visiting www.london.gov.uk/biggreenpoll