Cartagena is holding ten days of events remembering the Romans and Carthaginians. See details and picture here.
Nearer home:
The Ravenglass and Eskdale Railway, the country’s longest and most
spectacular steam railway, is running Steam and Romans experiences this
Autumn, to enable Western Lake District visitors to reach isolated
Hardknott Fort, one of the most inaccessible and spectacular Roman
sites in Britain.
See more here.