My wife bought me this great map last week from the Ordnance Survey
It's got a map of Roman towns, major roads, villas and industrial facilities, overlain on a faint map of the current UK. It also has a few little panels and box-outs with a brief history of various Roman institutions (Villas, Towns, etc). All in all a very nice thing for any ancient history geek - but she really doesn't need to encourage me; I'm quite capable of spending/wasting time and money on wargames all on my own!!