Genealogy / Monte Cassino + Russian labour camp [23]

It has probably already been mentioned somewhere on this site, but one place I managed to acquire one hell of a lot of information was via the Hoover Institute (I cannot find the email address of the person I dealt with). They have copies of all of the "Ankietas" or depositions of all those who were captured and held by the Russians - I say "all", I mean many.

Law / UK connected flights and Karta Pobytu (non-EU country) [7]

As the other posters say, the UK is not in Schengen so a visa for Poland does not apply in the UK.

If you are simply transferring onto a another plane in London, then like almost all other countries, you need to get a transit visa.

If you are a non-EU resident and want to come to the UK to work, then you need a work permit and visa. No employer can (legally) employ you without this.