One in 10 Millennials admit that they are unsure who else has a set of keys to their home, according to research conducted by Ocean Finance.

They asked those surveyed who else had keys to their home – apart from the people who live there. Over three quarters (77%) of respondents say that they have given other people keys, and one in five  say that they’ve given out two or more sets of keys. The people we’re most likely to hand a set of keys to are family members we don’t share a home with. But neighbours, cleaners and dog walkers are also often given a key to people’s properties.

Perhaps surprisingly, one in five Millennials give keys to a cleaner compared to only 2% of those aged over 55. And almost one in 10 (8%) Londoners give keys to a dog walker.

Overall, 2% of people admit that they don’t know who has keys to their home. But among Millennials, this increases to one in 10 not knowing who can get in.