Woke up one day and I was overweight? Never saw it coming but decided to sort it. BMI was adrift but this is age related (I have shrunk 1.5")
Now retired I decided the damage was executive lifestyle - so

No alchohol
Count every calorie (THANKS FATSECRET)
few meals out
More walking

Aiming at 2000 Kcal per day
so far lost 20lb I set my goal at 10st so only 30lb to go!

10st is less that I weighed at 21yr old but I guess th\t seting a challenging target is better than being complacent and going for 11.5st which was my original target.