The Riverside spokesman said £3m had been spent on new kitchens, boilers, window and roof replacements on the estate, alongside £1.3m on insulation and ventilation in more than 200 homes.

A dedicated damp and mould team had also been set up to "prioritise cases and ensure we act quickly and decisively," they added.

Becky, 35, who also lives on the estate, said her daughter had been in hospital with multiple skin lesions caused by what a dermatologist said was the condition of their home.

She said they had been in temporary accommodation for nearly a year and "my daughter is now healthy again, miraculously".

Becky said they did not want to return to their property and the stress of the situation had caused her to come out of work.

"We are still on lifelong medication because of that house," she said.

Middleton Tenants Union, part of the Greater Manchester Tenants Union (GMTU), said it had been challenging Riverside for two years over 20 similar cases involving children exposed to damp and mould.

They said Riverside's senior management team was refusing to meet with the union to discuss the cases and were instead directing tenants to the Housing Ombudsman.

Riverside said it remains "open to having transparent and constructive dialogue with GMTU and have met with them a number of times over the last two years".

Kirby Hoyle, from the union, said the conditions were not fair on the families.

She said she was supporting tenants whose properties had rat infestations, damp, mould, asbestos, "general wear and tear", leaks and "roofs falling in".

Riverside said customers had been invited to meet "one on one, or with GMTU as a tenant advocate.

"We know we don't always get things right and are sorry if there are occasions when we have let customers down, we always ensure we put things right and learn from any failures", it added.