A mother to whom David Cameron promised before the general election that he would do nothing to harm disabled children has blamed him for cuts which she says are forcing her daughter to be put into care.

Riven Vincent, who looks after her severely disabled daughter, Celyn, posted on the internet yesterday that she had been refused extra respite. She said the refusal to provide her with more support meant she had taken the decision to put her six-year-old daughter into a care home.

"Have asked social services to take dear daughter into care," she posted on the internet. "They have refused extra respite. I can't cope."

Ms Vincent, from Bristol, said last night that she had been disappointed that Mr Cameron had failed to deliver on a personal commitment he gave when he met her before the election last May.

"This is a side effect of the cuts. He could have protected families with disabled children from a lot of this," she was reported as saying.

"I would be angry, if I wasn't so tired."

A spokeswoman for Mr Cameron said the Prime Minister would write to the family but that Celyn's care was "a local council issue".

She added: "We are committed to continuing to improve respite care for carers of disabled children."