to answer some questions:
someone is specifically asking about finding an orthodox church in uk that may be related to the polish orthodox church.
last year, i travelled on a ferry between britain and france.
in boats and airplanes traveling from uk, announcements have always been made in 2 languages; english and french, as these are considered international languages.
well, last year, all the signs on the boat were in english, french, and polish.
yes, polish has become the 3rd language used in uk due to the very large number of polish immigrants!
about orthodox Christianity in uk, saint john chrysostom wrote this about the story of the woman who anointed Jesus and wept:
"yet that a woman who was a harlot poured out oil in the house of some leper, in the presence of ten men, this all men celebrate throughout the world; and so great a time has passed, and yet the memory of that which was done has not faded away, but alike Persians and Indians, Scythians and Thracians, and Sarmatians, and the race of the Moors, and they that dwell in the British Islands, spread abroad that which was done secretly in a house by a woman that had been a harlot."
(this may predate the greek church...)