As part of his Pantheon duties, Bruce Banner goes to find the Loch Ness Monster.
Nessie does the mafia thing to Banner (i.e., throws him in the water with an anchor around his feet).
Except it turns out he’s actually a villain named “Piecemeal” who is like a Frankenstein monster of Hulk villains, created by enemies of Pantheon.
Hulk fights Piecemeal and other local enemies.
While he’s in Europe, Hulk meets some Marvel UK characters, like Killpower.
Marvel also tried to incorporate its UK characters in Excalibur.
I haven’t tagged them because these efforts fizzled out and didn’t really amount to anything in the long run, so I’m not considering them 616 canon characters.