I don't think it's great but with a small adjustment it could be loads and loads better!
At the moment, you aren't eating any vegetables! And very little protein, and I think if you count the amount of carbs/ sugar, it would be over what's recommended.
Also, eating five times a day will result in weight gain because you're spiking your insulin throughout the day. Try eating more satisfying, protein rich meals with lots of veg, and eating them in a smaller window of time if you can.
your current diet:
25g granola or oats - Granola very high in sugar - porridge with oats and whole milk fine though.
Low fat Greek yogurt - low fat options are usually UPF
Berries - high in sugar
Honey - very high in sugar
Snack
Banana / apple - OK but overall this is adding up to too much sugar
Lunch
Beans/egg on whole meal toast - Egg and beans fine, although heinz beans can be high in salt/ sugar -bread OK if the toast isn't UPF, but most sliced supermarket bread is.
(Small amount of real butter) - fine
Snack
Kit kat and a cuppa - UPF/ very high in sugar
Dinner
Jacket Potato cheese/beans - more carbs and beans?! No Veg?
or
Sausage and mash/roast potatoes with veg - more carbs, sausages are highly processed and high in bad fats and salt
I think with very slight adjustment it would be much better, and you can cut out the snacks because these meals will be more satisfying:
Porridge with oats and berries/ banana, nuts and seeds, and possibly a small amount of honey
or
Berries/ fruit with full fat Greek yoghurt, nuts and seeds, and a small amount of honey
(no granola)
Water
no snack
Lunch:
Homemade baked beans (make with tomatoes, onions, garlic, spinach, paprika, cumin, parsley etc - make a big batch and freeze in portions)
Plus two eggs, with feta, either on its own on one slice of non UPF wholemeal bread
Fresh herbs on top/ side salad if wanted
Water
no snack
Dinner
A leaner protein, such as fish, with vegetables inc. root veg, and a side salad with avocado
Water
Good luck!