UK's principal 20th-century conflict museum with D-Day and WWII exhibits; essential context before visiting Normandy (museum typically open 10:00am–6:00pm).
Fast shuttle under the Channel — book a morning slot in advance; crossing is ~35 minutes door-to-door (terminal arrival/check-in advised 30–60 min prior).
Immersive short film presenting the Mulberry artificial harbor and D-Day planning; cinema usually open 10:00am–6:00pm — excellent context for the coastal remains.