NEST (National Employment Savings Trust) has been set up by the government specifically for automatic enrolment. It is a master trust, which means that it is a collection of workplace schemes all held together under one trust and looked after by a board of trustees to ensure it works as it should. This also means that smaller schemes can operate as part of the larger trust and therefore benefit from competitive terms.
The scheme can be operated online and moved between employers within NEST. If an employee leaves the company they can continue making personal contributions (this needs to be a minimum of £10 each time).