The 'Eatwell Guide', produced by the NHS, is a repository of information, tips, recipes and some guiding principles collected to help ensure a balanced and healthy diet.
You can download the PDF version of the cover sheet here:
You can find the full comprehensive guide online here:
www.nhs.uk/live-well/eat-well/the-eatwell-guide/
You can also check out this summary video of the main principles of the guide here: