[John H K]

The Royal Navy would have had something to say about it.

Why? At the time the most recent war scares the British had had was with the US over Venezuela, and with the French and Russians. The German-British rivalry really hadn't gotten going yet, and the British-American friendship hadn't either. At the time, the only real close ally the British had was Japan, and the British didn't actively support them in the Russo-Japanese War in 1905 (though they came close after the Russians idiotically shot up a bunch of British fishing trawlers thinking they were Japanese torpedo boats).

The British likely would have done absolutely nothing.

[Snake65]

You make a great point, Britain was still in her "splendid isolation" mode and more wary of the other colonial powers (France in Africa and the Near East, Russia in the Far East and the subcontinent). After Wilhelm forced Bismark out in 1890 the Kaiser was pursuing dreams of Empire and a larger navy, which I think touched the Brits in their tender spot. A German adventure in the Atlantic such as the one described would have staked a claim to naval dominance in the North Atlantic, and the British Empire wouldn't have stood for it, IMO.

But I see your side.