The UK maintains a fairly broad array of amphibious combat capabilities with contributions from the Royal Navy, Royal Fleet Auxiliary, the British Army and a number of civilian providers.One issue is size. The RN is under-sized and under-funded.
In many ways, the future looks bright; improvements to naval gunfire, new support helicopters and attack helicopters on the horizon, and of course, the carriers and F-35B capability, joined by development in unmanned systems, all point to a strong future.
But with the impending ‘out of service’ date of HMS Ocean, block out of service of the amphibious shipping in the medium term, a changing threat and political landscape, and the constant pressure on budget, there are many difficult issues that remain to be resolved.
More good reading at the Royal Navy website where "sea blindness" is being fought daily:
Maritime trade is the lifeblood of the UK economy and industry. 95% of Britain’s economic activity depends on the oceans. And every year Britain imports goods worth £524 billion.The UK has 77 commissioned ships, including "13 frigates and 6 destroyers." See also here. By comparison, Japan has 46 destroyers and naval vessels..
The UK is so dependent on the seas for its prosperity, that without the Royal Navy acting as a deterrent the effect on the economy would be overwhelming.