A government guarantee, protecting pensions for millions of elderly people, would be under threat if the UK quits the European Union.

British Prime Minister David Cameron warned of a self-inflicted recession, leading to a lost decade as Britain grappled with a Brexit success. A so-called triple-lock guarantee has been government policy since 2010, ensuring an annual above-inflation rise in state pensions.

It is the last full week of campaigning ahead of the June 23 national referendum to decide if the UK should remain as a member of the EU, or leave.