Errr ....
Well, its not actually Eurocontrol who is charging you - it is the state(s) you fly though.
Eurocontrol collects the charges, in accordance with a scheme and rates defined by the states themselves. Eurocontrol distributes the collected fees back to the states on a distance flown pro-rata basis.
Eurocontrol doesn't set the charges, nor keep them (apart from a very small admin fee).
It won't change you being charged, but you will know who is charging you - the UK CAA!
GB