I am about to go to war with my neighbour over their cunting dogs if they don't take any notice of my polite note that I'm about to put through their door.
I rang the council about some different dogs at my last house but pussied out of taking it any further when they rang me, known the old lady for years and years and didn't want to upset her.
Mate your local council are obliged to investigate this sort of complaint.. http://www.legislation.gov.uk/ukpga/1996/37/section/2 and they're the ones with the powers to deal with it. They'll send you a diary sheet to keep a record of when it happens. Anyway alot of times this gets resolved with a simple warning letter.