Wazzy = weak flavoured, i.e. watery
You can still get milk from a milkman you know and it has the cream on top just like it always has. I also find it amusing that even full fat milk can be legally sold as a low fat product as teh definition of low fat is under 5%. Full fat milk has a combined content of 4%, Semi Skimmed is ~2% and IIRC Skimmed is 0.5%
I used to like raw milk as well but you can't get it anymore. Jersey milk is also still available.
Supermarkets sell Homogenised milk where the cream has been spread throughout teh milk equally, probably due to how they package it one 4pinter would be all cream and another all 'wazzy'
Pasteurisation does not mix the cream such taht it will not seperate out again on its own.