Sometimes it takes more than sensible eating, exercise, a new hairdo or expertly applied make-up to convince you that you look great – whatever others say. Some people live peacefully with the marks of time; ‘I’m used to my face travelling south’, one 50-something beauty told us. Others feel that improving on the effects of ageing, an accident or simply altering a long-disliked feature will boost their self-confidence. Here is the lowdown on cosmetic surgery and cosmetic dentistry, plus our tips for gentler, non-surgical ways to delay the march of time.