Brook, the sexual health advisory service, said: “We know what works to improve young people’s sexual health and wellbeing — providing easy access to services, education and information. The decline in teenage pregnancy rates shows what can happen when these elements are all in place.” Havering achieved the greatest decrease, from 44 to 23 teenage pregnancies, or 47 per cent in one year. However, Croydon, Redbridge and Merton saw a small increase.