Chris Bagnall, 44, set up this company in 2013 with his savings and a £90,000 investment from venture capital. He had spotted a gap in the market for a full-service marketing agency for clients working in the technology sector. Clients now include the online file sharing site Dropbox and the tech giant Hewlett-Packard. When the latter needed support to target business customers overseas, Transmission helped devise and execute a marketing strategy with a focus on key buyers. Headquartered in London, the firm set up its first overseas office in Munich in 2016, and sales from the two sites reached £17.4m in 2018. In January, it launched in Sydney, San Francisco and Singapore.