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Our Other Service Activities B2B directory holds details on thousands of companies currently working in the industry. We update the information held about these UK-based companies regularly, to ensure it is always as accurate and up to date as possible. With this in mind, we've used out platform to put together the following list featuring the leaders in the industry, all based on their turnovers.

The results are incredibly varied. From a wholesale computer equipment business that's turning over hundreds of millions of pounds in only its sixth year, to an airline company in fifth place that's enjoying £1.8 billion worth of profit after nearly seven decades in operation. Check out the full list below.