Inflexion, which is an investor in tour operator Scott Dunn, also supported a buy out of On the Beach in 2013.

Reed & Mackay, which focuses on law firms, insurance companies, finance houses and the energy sector, managed almost 600,000 client travel transactions in the year to March.

It has seen its client base grow by more than 68% to nearly 500 since ECI invested, alongside Livingbridge in April 2011.

It now has offices in Scotland, the US and the UAE.

Reed & Mackay’s total transaction value passed £200 million for the first time in 2014 and is on track to reach almost £250 million this year.

Staff numbers expected to exceed 400, compared to 250 in 2011.

Inflexion is an experienced investor in the travel sector, particularly in backing companies where technology plays a pivotal role.

Fred Stratford, chief executive at Reed & Mackay, said: “It has been an enjoyable and rewarding few years working with ECI and Livingbridge

to help strengthen Reed & Mackay’s International footprint and to develop the value proposition in line with client demand.

“We have achieved a huge amount together and now I look forward to working with Gareth Healy, Mark Williams and the team at Inflexion on our next phase of growth.”

Simon Turner, managing partner at Inflexion, added: “We’re delighted to be investing in Reed & Mackay and working alongside its ambitious team to support the next phase of growth, both in the UK and overseas markets.

“Reed & Mackay is a classic Inflexion investment; great team, superior technology platform and superior service driving exceptional growth.

“We bring experience from across the travel sector both with consumer brands, Scott Dunn and On the Beach, where bespoke technology also played a significant part in growth and differentiation, and corporate travel through Griffin Global Group - all successful multinational businesses.”