Not to be confused with the arcade, this was to be a sequel to the Ariolasoft game from 1986, and released on their British Software label.
This was mentioned in the inlay for the first game as coming soon, but never surfaced at all. It was most likely going to use the same engine, just with different maps.
It could likely be due to the name causing licencing issues, or even poor sales of the first game.
With no developer details known, this could be pretty tricky to find out more. Do you know anything about this game?