If there’s one thing London needs right now, in the midst of opaque Brexit haggling and a fuzzy economic outlook, it’s clarity of vision — the figurative kind. Trust an architect to take that metaphor literally and, with a grand voilà, unveil a plan to help people see out to Surrey from a high point in the heart of the City. Norman Foster, a.k.a. Baron Foster of Thames Bank, has proposed the Tulip, an observation deck on a concrete stem, 1,000 feet in the air. This is to be no ordinary viewing platform, but a multistory glass bubble, where visitors can have a drink or a meal, absorb a little history, hurtle down a glass slide, and tiptoe across sky bridges. Best of all, they’ll be able to climb into a glass pod that glides across the façade exterior, bobbing and looping gently far, far above Bishopsgate.

This kind of vision, London can do without.

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