interpreter,
like yourself, I'm not a controller, and unfortunately, I can't interpret from the first line of your last post whether or not you are a pilot.
If you are a pilot, (of whatever level of proficiency), please try and arrange a visit to EGKK.
Better still, try and arrange a visit to the ATCC at Swanwick. Granted, it's not as easy to set up these things as it was, but NATS is very customer-focussed still.
Most ATCOs enjoy talking to pilots about the job they do and the constraints which are imposed on them, - often by people not connected with aviation.
Oh, and if do visit an ATC facility, always take a tin of biscuits or chocolates, and I guarantee they'll make you a cuppa'.