There was definitely a slight difference between East and West Hull accents, maybe not to the average joe from elsewhere, but i guess being from 'Ull you could tell.
On a similar topic, some of the Aussies i work with think its good how we can tell roughly what part of the England Brits are from just by their hearing them talk. I guess most of it is how we have grown up hearing different accents thanks to the medium of television and probably folk travelling around the country more.
There can't be many countries that has such variation in how folk talk. I can now start to pick out Queenslanders and outsiders by their accents but they aren't as varied as the UK. Mind you picking up the Queenslanders maybe down to seeing them in bare feet driving a 'Ute'.