I haven now had the rest of the results back:
TSH less than 0.01 (2.6-4.2)
FT3 15.1 (2.6-5.7)
FT4 36.8 (11-25)
Thyroid Antibodies TPO 49.2 (less than 6)
GP wants me to lower to 150 thyroxine and 20 UK liothyrnonine (was taking cynomel 25 which is 3 x more potent than thyroxine wheras UK liothyronine is only 2 x more potent). They will prescribe 150 thyroxine and 20 liothyronine and said bloods to be done in 6 weeks, though only TSH, not full profile.