Several times a week there are flights in and out of Birmingham Airport
by elderly Antonov An-12 cargo aircraft - all over 50 years old, and
looking like a Russian version of a Hercules. Not always the same
individual aircraft - they belong to various carriers and are usually
registered in Belarus or Ukraine. According to FlightRadar, they are
mainly plying between Birmingham and various destinations in Slovakia.

Anyone got any idea what they might be carrying?
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Cheers,
Roger