LOW CARB shopping list needed asap please

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Hi all!

I need your help, I have been reading and reading all week and have decided that I need to switch to a low carb diet to treat my PCOS and to shift the weight (my weight is not coming off with a 1200 calorie diet) I live in the UK and am off to the shops in the morning but thought I would stop and ask to find out what are your "must haves"

Any quick and easy snacks? (I HATE nuts of all kinds)
Fav receipes?

Help.