How did napoleon try to stop the British?

Like Hitler, Napoleon intended to invade England, but was never able to concentrate the ships and men to do so. He formed the 'Army of England', which was intended to be comprised of the 50,000 troops he estimated would do the job. These troops were never available, and he abandoned the plan.

England however, planned a defense, which relied on Fencibles, Yeomanry, Militia, and armed civilians in addition to Regular troops, and depended upon a 'scorched earth' strategy intended to deprive Napoleon's army of forage. Eventually, the 'scorched earth' approach was abandoned in favour of a more conventional defense which was, of course, never used.

In 1797, however, the French did attempt to invade Ireland with 500 troops, but the ships carrying them were destroyed by a squadron under Edward Pellew.