Water builds up in the oil from generally 2 things: Running in very damp conditions( I think Ireland checks that box), not running long enough to burn off the condensation that builds up in the engine.
generally as long as you run the engine for longer periods of time on occasional basis, the condensation usually burns off.
Techron might be available in your area, otherwise redex is supposed to be ok but hard to say how well it will work.
Star-tron might be available to you as well.
The ride IS the adventure. The destination is just to get gas!