SARAH VINE: This is what I really look like. I've spent 15 years hiding my hair loss but this is why I've now decided to reveal my real hair - and the new treatment that has offered me hope ⊕⊕

This has been an eventful year for me, writes SARAH VINE. But if my memoir has taught me anything, it's that the truth really can set you free. Honesty, it seems, really is the best policy.