OA32. I would be interested in seeing the law that you refer to. It is my understanding from my own SB unit in Northampton that once you are in Europe which Cherbourg constitutes, your onward destination is nothing to do with UK SB. They have told me they are only interested in direct flights as it is there view that it is up to the CI and French authorities to do whatever they need before onward flight.
We have enough pointless rules without making more up.
However if you can show me where the law states any different I am prepared to listen.