I can confirm. People from Bury call it Berry. People from Manchester, only ten miles south, call it Burry. I say Burry. But, confusingly, I say Shrewsberry....
Viva (as in viva voce) is pronounced vyva. I have never, in my whole academic career, heard anyone of reliable and senior intelligence pronounce it differently.
I also dislike it when people add an "s" to the end of a name that does not have one, such as "Superdrug". To be ironic I have taken to calling Tesco, "Tescoses".
Ah, I agree with you. Tesco is Tesco. But, is it really incorrect to say "I'm going to Tesco's", in the context of "I'm going to Tesco's supermarket outlet"? Of course, that means you are saying the possessive Tesco's, not a plural Tescos....