Places in Great Britain have weird names. Everyone knows this. It’s hard to escape if you’ve ever taken the Piccadilly Line tube, final destination: Cockfosters, or have been to Splott or Pratt’s Bottom (or, god forbid, Shitterton).
To make things even more confusing, very few place names are pronounced the way they appear on paper. Deceptively easy: Worcestershire, famous for the sauce.
The correct pronunciation is WUSS-tur-shear. I have no idea why, but my working theory is that Brits don’t want to waste precious minutes pronouncing the full name of anything. They could be talking about the weather instead.