I've only just started the 5:2 diet, I really like it and I manage fine on fasting days.
Week 1 I lost 3lb then week 2 I'm seem to have maintained (I'm not supposed to weigh until tomorrow morning but just stood on scales and it says I'm the same as last Monday morning) 
My TDEE is 1800 calories, I can stick to this no problem during the week but at the weekend I've gone way over, husband and I often get a takeaway at the weekend and I'll have a glass of wine in the evening and eat out with the children etc
Therefor I was wondering if I'm best doing 4:3 to make up for the fact that I go over my calorie allowance at the weekend? Or does it not work like that?