Mutuals continue to play an important part in the UK today, looking after the interest of their members and the communities they're based in.
You'll find mutuals within all sectors of financial services (including banks, building societies, friendly societies and insurers) as well as the public sector too.
Just like other financial services providers, UK mutuals need to be authorised and regulated by the Financial Conduct Authority and the Prudential Regulation Authority.
Mutuals are big business. Today in the UK, they manage £125 billion in assets and have more than 30 million members.*
If you're confused about ISAs and the different types and would like to know more, our guide could help.
If you're saving for your child, a Junior ISA could help you build a long-term investment, that's theirs and they can access it when they turn 18.
If you can't decide between an investment ISA and Cash ISA we've weighed up some important factors to consider for both.