3 weeks to lose as much as i can

Cut out meat (esp red) as much as possible. Eat lots of fresh fruit and veg. Drink water and not much else. Exercise if you can, even if it's a 30minute walk to the shops and back each day.

Normally I would say slow and steady but as you are aiming for a big weight loss cut out all treats, and I mean all - no chocolate, no crisps, no takeaways, no wine...extreme, but you don't have much time left.

Thanks for that i will do this