Nah i disagree with a Townie being a Chav
Townies = Trendy clothes but not the attitude of a chav, don't do all the weed and don't speak like a twat.
Chavs = Speak like a twat, do all the drugs, trendyish clothes but normally mixed with tracksuit trousers, socks over their trousers and either rockports or sporty trainers, and a cap pointing up as high as they can go.