Childminders and nannies
An au pair is usually a young person looking for an opportunity to travel and live/work with a host family in a new country, learn a foreign language and experience a country's culture. The au pair will work a set amount of hours for the host family, usually doing a mixture of childcare and light housework. The au pair may have some childcare experience and even qualifications, but an au pair is not a nanny.
For more information about au pairs visit the British Au Pair Agencies' Association.