Rhona and Kate, both 29, set up Big Friday after they spent their weekends taking friends surfing and realised how many people wanted to go. They still have their day jobs - Rhona in PR, Kate in an international development charity - and run the company in the evenings and weekends. "It's hard work," says Rhona, who has been surfing for two years, "but it's worth it to see so many people returning to London happy after a brilliant weekend."