Ageism could become a hate crime under a review of the law to be announced by Sajid Javid, the Home Secretary, as he revealed the racial abuse and threats he had suffered himself.

Mr Javid has asked the Law Commission to investigate whether ageism and misogyny should be recognised as hate crimes in the same way as offences motivated by hostility based on race, religion, sexual orientation or disability.

Charities estimate around one million older people are victims of physical, financial, psychological and sexual abuse each year yet say criminal convictions are rare and sentences too lenient.

They argue police and prosecutors would be able to take tougher action and apply for stronger sentences if hate crime could be taken into account as an aggravating factor in offences.

Mr Javid said the move was part of a review to make the legislation more effective: “Hate crime goes directly against the long-standing British values of unity, tolerance and mutual respect - and I am committed to stamping this sickening behaviour out.

“Our refreshed action plan sets out how we will tackle the root causes of prejudice and racism, support hate crime victims and ensure offenders face the full force of the law."