Being a citizen of Russia I am going to fly from Punta Cana to Cologne, Germany with an airside transit in Manchester Airport. I have a Schengen visa, travel only with my hand luggage and there is two hours between the flights. If my connecting flight is through a different terminal, will I need to pass through UK border control? Will I need a UK visa?
Manchester Airport's website isn't overly helpful in this respect, but if it's a single ticket then it looks like you can transfer airside and therefore, wouldn't require a transit visa
If you have booked separately with two airlines (i.e. there is no transfer agreement in place and you do not have an onward boarding card) then you will need to reclaim your baggage and check in at the relevant terminal. Our three terminals are within walking distance of each other. If you have a transfer in place, you should follow the signs and proceed on foot to the Flight Transfer centre in the relevant terminal.
If, however, it's two separate tickets, then you need to pass border control to check in for the onward flight and, thus, may need a transit visa depending on what kind of Schengen visa you hold.