Also the current drawback rate is 0.281 which gives you a better return than simply not being charged VAT.
Not to mention another, simple economic fact which no-one has mentioned.
If you fill up at Lydd you
only get VAT free fuel on what you put in (which will possibly cover the landing fee).
however
If you claim back drawback you claim it for
the capacity of your tanks if you departed full (and you'd be a schmuck not to).
More money back, plus no extra landing fee paid out