I'd look at it in terms of what are the least flexible ingredients. I'm no great fan of Target as a hop, so I'd be looking to get rid of that, and the barleys point to a stout of some kind, at a pinch you could make a stouty mild. So I'd start with that, then you're pretty flexible - but a best bitter or maybe something British but stronger looks plausible.
You will need some base malt though.