Earpiece;
I can't find the exact piece of paper right now, but I do remember that the CAA required an ability to hover out of ground effect on one engine and to carry HUMS for CAT flights.
I go there regularly and would say that in certain wind conditions/speeds it is not for the faint hearted. With the wind off the river you can find yourself with a hefty crosswind, and with the wind from the east the wind sheer can be very entertaining.