Sainsbury’s and Waitrose do my favourite low carb products and hotel chocolate is my go to for my favourite 100% chocolate buttons
Waitrose livlife bread and
97% pork sausages - available in most other stores too but prefer the Waitrose butcher ones!
Waitrose own Frozen chargrilled vegetables which are great as a basis for lots of meat casseroles and include peppers and courgette
Sainsbury’s - explore cuisine bean pasta products including fettuccine and spaghetti again think available other main supermarket but got on offer here
Blocks of coconut cream in international foods section a slice mixed with hot water good for thickening casseroles and once opened can store in fridge.
Hilo bread is similar to livlife my personal fave is livlife
Aldi coconut oil tubs and olive oil
Sugar free jelly from any of supermarkets often add some cream when mixing to make it into a low carb mousse.
I buy most of my specialist baking ingredients such as coconut flour and erythritol etc from amazon as tends to be easier and cheaper
Hope this helps