Film any incidents on your phone and report the cunt to the police and local council dog warden. Tell the owner their dog will get put down if it continues to be out of control (not sure if true) which should at least get them to responsibly avoid you.
Police won't give a fuck with dog on dog aggro. Dog on human, they'll get involved as long as you've done all the investigation and hard work for them. That's as long as they don't have to put their kebab or cuppa down.
Film any incidents on your phone and report the cunt to the police and local council dog warden. Tell the owner their dog will get put down if it continues to be out of control (not sure if true) which should at least get them to responsibly avoid you.