I advise to glance at:
www.strefa.co.uk/fm/
www.londynek.net
My personal concideration is that
it's better to loos money learning english in Poland
than to loos money going to UK just to realize You can't speak english,
be aware of it, even as a kitchen porter or cleaner You got to know more
than 'shit and f..k you'

one more there's new polish usenet group associated with uk emigration...