Q&A: Do modern cities still have fortifications?

Are cities still fortified in different ways, such as the missile mounting positions around London?

Yes, but prepared positions alone do not supply a defense: the reply questions whether Britain has enough missile batteries to use them.

Defensive works can take different forms from a continuous city wall. In this March 2023 exchange, surface-to-air-missile mounting positions around London are offered as an example. The reply questions their practical value when Britain lacks enough missile batteries to fill them. Preparing a site and providing the weapons for it are separate parts of defending a city.