Notwithstanding its Candian roots Zoom has a UK AOC No 2316. If they are refusing to comply wth EU regulation 261/2004 then that seems a good reason to write to te CAA and ask that their AOC be cancelled as they refuse to comply with relevant national law.
Write to :
Air Transport Uses Council (part of the CAA)
www.auc.org.uk
http://www.caa.co.uk/default.aspx?ca...90&pageid=6480
"Regulation (EC) 261/2004 sets out passenger rights against airlines when flights are delayed, cancelled or overbooked. It also requires, under Article 16, that each EC Member State shall designate a body responsible for the enforcement of the Regulation and a competent body that airline customers can contact concerning alleged infringements. The Civil Aviation Authority is responsible for enforcement; the Air Transport Users Council (AUC) provides advice to the public on alleged infringements, and provides information to the Civil Aviation Authority if, in its opinion, a particular airline is consistently breaking the rules"