mate I am telling you it’s /wʊstəʃə/ I am english I can guarantee by how you’re saying it’s pronounced you are not why are you so confident when you couldn’t even point to it on the map there is no ch in there it’s just a c and cester is pronounced /stə/ if you really don’t believe me just go look at the wikipedia page it puts some r’s in there for rhotacisation but otherwise it’s the same as how I wrote it how can you be so confident while being so wrong