B12 is best over 500, preferably at the top of the range.
Folate is best at least half way through it's range.
Vit D is good, the Vit D Council recommends 100-150nmol/L.
As for your thyroid results, how do you feel? Most people feel best when TSH is 1 or below with FT4 and FT3 in the upper part of their ranges. Your FT4 is good, FT3 could be a bit better. Getting your ferritin to at least 70 can help with conversion of T4 to T3, as can supplementing with selenium L-selenomethionine 200mcg daily.
I feel very tired especially in the morning and evenings and constantly suffer from ‘brain fog’ through out the day.
With regards to increase iron, TIBC and ferritin, do you know if over the counter iron tablets will be sufficient? And also does anyone how much iron I should take daily?
I don't fully understand iron so I never suggest anything as I could be wrong. The only thing I do suggest is when ferritin is low it can be raised by eating liver regularly, maximum 200g per week. Other than that a full blood count should be done as low ferritin can suggest iron deficiency anaemia and a FAB would confirm that (or not).
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