Steel Commando.

Also appearing in the 1976 LION Annual is a story about the Steel Commando.
More Beano than Lion, this character is a World War II secret weapon put under the control of Lance Corporal Ernie 'Excused Boots' Bates. What could possibly go wrong ?

You can tell what sort of story you're going to get when you discover that the man who created the robot is called Professor Brayne.

and it starts to play out in this story as a short circuit causes the Steel Commando to go 'loopy' whenever anyone says 'Blockhead'.
This 8 page story sees Bates and the Steel Commando go behind enemy lines in to try to get hold of an important map. They come across the German's own robot, which for some reason is used as a butler rather than a soldier, and there's a nice toouch when the Steel Commando is disguised as the robot Butler in order to get closer to the German command.

Not my cup of tea but it is a robot, so it's not all bad.