For more than 60 years, this family-owned firm has been manufacturing diesel generators at its factory in Lincolnshire. Under managing director Charlie Farrow, 37 — who is the third generation of his family to head up the business — it produces more than 3,000 generators a year, roughly 95% of which end up abroad, providing power for schools, hospitals, airports and police stations. Investments in a multi-language Facebook page and its IT infrastructure have helped secure clients in west Africa, Kenya, China and Sri Lanka, boosting turnover to £23m in the year to March.