The Diego Garcia base in the middle of the Indian ocean.

2000 miles away from Iran. A similar attack with the same distance could reach Germany, but maybe not the UK mainland.

Diego Garcia was rumored to be being used as a forward operating base of the B2s. The idea being is that they were safe from being attacked while on the ground due to distance. There goes that plan.

Neither missile hit the base, it added, though neither Iran nor the U.K. specified how close the missiles came to Diego Garcia.

Funny, the US is the other way around.
Claiming capabilities they only have in their imagination.