With a "rebellious, entrepreneurial spirit," Cooper Parry has never been the type to blend in.

The UK's fastest-growing accountancy firm, with a Derby HQ and offices in London and Birmingham, gives its team of more than 600 employees the ultimate flexibility. They get unlimited leave, are trialling a four-day working week and can 'Work from Anywhere, Anytime, Forever.'

For Cooper Parry, it's "about outputs, not hours worked," so people can take holidays as and when they like. All the firm asks is that their decisions align with one of its core values, 'in it together,' ensuring they don't negatively impact colleagues.

As long as they get their work done, staff can choose their 'office,' whether it's Cooper Parry's offices – "some of the country's coolest workplaces," the gym, the café, a campervan in the Scottish Highlands or a Spanish beach.

And the trial of a shortened working week is proving successful – a conscious effort to reduce the time staff spend at work while maintaining their pay.

The 'in it together' ethos extends to all elements of the business. Nobody at the firm has an office – not even the CEO. And everyone is assigned to a values-themed house. There are challenges with points as prizes to encourage friendly competition and team-building across the business.