When we keep the receipts for mileage and stock etc do I need to highlight the item and put a note of what it was purchased for etc.?

we had to buy cash boxes and a safe etc so do I staple the receipt from tesco to a sheet of paper stating ...
purchase of cash boxes and safe for business use.
cost
date

im not sure how to store them or just chuck them all in a tin and let the tax office deal with it?