Ch. Flag,
If you look at the earlier pages, you'll see all of us have agonised over the flare height. I think most students go through two stages: too high (scared of contacting the ground) followed by too low (an overcorrection of the problem once it is recognised).
I guess your runway at East Mids is quite wide and long, which can also result in a high flare - you think you're closer to it than you are.
I woudn't worry about the height for pulling back the power, go for a nice stable approach speed with not too much change in attitude as you near the threshold.
Finally, one piece of advice that C-bert gave me in relation to take-offs, but applies equally to landings: Try to relax - it helps.
You might have already answered this, but what are you learning in?
HH