Ten per cent (5.8 million) of people provided unpaid care for someone with an illness of disability.
Over a third (37 per cent, 2.1 million) of those people were giving 20 or more hours care a week.
More top news
Big companies will have to show that their supply chains do not use child slave labour or exploit people, David Cameron has announced.
Disneyland Paris is reportedly facing a pricing probe amid claims it charges British tourists more than its French customers.
Overworked GPs are becoming so tired they could be putting patient's safety at risk, the head of British general practitioners has warned.