Local MP Alan Mak has shown his support for a group campaigning for fairer education funding for SEND.
He attended an event in Westminster organised by f40, which represents Hampshire County Council and 42 other local authorities across England that are among the worst-funded per pupil in the country.
It is calling for increased and more equal funding for education, particularly for those with Special Educational Needs and Disability (SEND).
Rising demand for SEND provision and poor distribution of funding has meant local authorities in England are estimated to reach an accumulated deficit of £6 billion by April this year.
So far the law has allowed councils to ignore such deficits in SEND spending, called the statutory override, but this provision is due to expire in 2028.
Once the current accumulated deficits are brought on to council books, f40 says it is estimated that nearly half of local authorities will be bankrupted overnight.
While the Labour Government announced plans to centrally fund SEND from 2028 in the Budget, it has not said how it intends to address the accumulated deficits.
Mr Mak said: "It is totally wrong that a pupil's educational opportunities are dependent on their postcode, with Hampshire receiving less than we need."
"There will always be some differences in funding due to area living costs and specific school and pupil costs, but the current disparity is far too wide.
"Some schools unfairly receive thousands of pounds less per pupil than others and this needs to change. Every child must be given the best chance to succeed in life."
He added: "I support f40's view that the SEND crisis must be addressed by the Labour Government through reform and investment that would enable local authorities to provide specialist provision for those with the greatest need."