It will promise no-one will have to sell their property in their lifetime to fund residential or home care.

Instead, the cost of care will be taken from their estate – if it is worth at least £100,000 – when they die.

Ex-government adviser Sir Andrew Dilnot said many people would have no protection from care costs.

The manifesto will also include:

Scrapping winter fuel payments to better-off pensioners – at the moment, all pensioners qualify for one-off payments of between £100 and £300 each winter

A reduction of the so-called “triple lock” on pensions to a “double lock” with the state pension to rise by the higher of average earnings or inflation – but to no longer go up by 2.5% if they are both lower than that

New money for the NHS, on top of current spending plans

An extra £4bn on schools in England by 2022 – partly funded by an end to the current provision of free school lunches for all infant pupils in England

Measures on immigration, including asking firms to pay more to hire migrant workers, who will in turn be asked to pay more to use the NHS

The social care changes proposed are that the value of someone’s property would be included in the means test for receiving free care in their own home – currently only their income and savings are taken into account.

People will be able to defer paying for their care until after their death. Those in residential care – whose property is already taken into account in the means test – can already do this.

There will also be an increase in the amount of wealth someone can have – savings and the value of their home – from the current £23,250 to £100,000 before they lose the right to free care.

That means that however much is spent on social care, it becomes free once someone is down to their last £100,000.