And definitely follow Unwin's advice here regardless of how you start out.
It's good advice (mostly) for a maintenance diet.
"Eat healthy proteins… Try basing your meals on non-processed meat like chicken or red meat, eggs (three eggs a day is not too much), fish – particularly oily fish such as salmon, mackerel or tuna –are fine and can be eaten freely. Plain full fat yoghurt makes a good breakfast with the berries. Processed meats such as bacon, ham, sausages or salami are not as healthy and should only be eaten in moderation"
"All green veg/salads are fine…Eat as much of these as you can –turn the white stuff green"
"Cheese only in moderation… It’s a very calorific mixture of fat, and protein."
I doubt anyone would disagree with that for a maintenance diet, avoid unhealthy meats, eat veg and salads, and watch the calories.
Mind you if you do actually reverse it, obviously any food is back on, but I still avoid unhealthy fats and processed foods like bacon ham and salami as he suggests.
(I do have a weak spot for a decently made sausage, so long as I watch the calories (mainly by looking in the mirror!) it's fine)