David Cameron will "need to take bolder steps than any previous Prime Minister" in ensuring security and dignity for people in retirement, an open letter signed by 16 charities and organisations has said.

Lewisham Pensioners Forum have signed the letter, which says that, with a rapidly ageing population, more must be done to look after the older and frailer members of society.

It calls for the Prime Minister to address the threats to older people of loneliness and inadequate housing, tackle a lack of proper care and support, and address their concerns in getting the necessary help to remain well and independent at home.

Janet Morrison, chief executive of Independent Age, one of the charities to have signed the letter, said: "The actions of the Prime Minister now will help determine the extent to which current and future generations really have security and dignity in retirement.

"With one week to go until the Queen's Speech, crucial decisions are needed on health, social care, housing and other areas. 

"Clarity on these will encourage people to consider how they plan to fund and experience their older age and take responsibility for their own health and well-being as they grow older."