A decision is set to be made on whether to make Windmill Primary School Oxfordshire’s biggest primary.

Oxfordshire County Council’s cabinet is set to approve the proposal to move the Headington school from two form to three form entry, taking 90 children each year, at a meeting on Tuesday.

The proposal has attracted controversy, with parents raising concerns about traffic, impact on the character of the school and lack of detail about how the extra pupils would be housed.

Headteacher Lynn Knapp, and chairman of governors Mayte Siswick had objected to the proposal.

They felt the £1.9m budget allocated would not be sufficient to build extra classrooms, enlarge the hall and kitchen, extend the after school club and provide other related facilities.

But Mrs Knapp said after discussions with education cabinet member Melinda Tilley she felt “optimistic” about the proposals.

She said: “I feel like I have been listened to and people are doing their best to get what we want, providing it fits in within budget, and I think there will be some movement in the budget if there needs to be.”

Of 126 responses to the consultation, 80 per cent were against the plan. The proposal is to permanently expand the school from September 2013, meaning by September 2016 the school would eventually take up to 630 pupils.

Mrs Tilley said: “I am confident we now have a deal that works for the school.”