The preferred common vehicle is the US Marine Corps Amphibious Combat Vehicle, used by an amphibious brigade and two strike-amphibious brigades. Royal Marines could secure an entry point, then Army formations arriving aboard Point-class ships could reinforce them with compatible equipment. Heavy assets would still use landing craft, but personnel carriers could drive ashore directly and move across inland waterways. They could also cross through the Channel Tunnel and continue across France, or return under their own power in the "reverse Dunkirk" scenario described here, subject to refuelling. The Sir Galahad example shows the danger of keeping troops concentrated aboard a transport while they wait to disembark.
Notable Point · 33:43-35:54
Amphibious vehicles for Royal Marines and strike brigades
Using amphibious combat vehicles across Royal Marine and strike formations would let troops drive ashore, reinforce one another, and reduce dependence on landing craft for every movement.