Good ideas. But letters from America probably carry more weight than petitions.
One thing that people keep getting mixed up about, (people on the Mudcat, people in Parliament, people in the Media) and I don't know how often it has to be repeated. This is nothing particularly to do with folk music as such, or pubs. A Public Entertainment Licence is a legal requirement in England for any live music, in any place to which the public has free access.