If flights are cancelled by Ryanair and no suitable alternative flight is available, we will, upon application, fully refund all monies paid in respect of the cancelled flight, without further liability.
Has anybody ever heard of a successful application for a refund? They don't answer the 'phone, etc. and get REALLY stroppy if you find a real (answered) telephone number and start trying to complain. Estimates for last year suggest that up to £20 million was made by Ryanair from unrefunded taxes, security charges, cancellations, etc. This is very much part of their business model.
woodpecker re your query some information is available at the following site (see the second paragraph)
http://www.ryanair.org.uk/ - but you will need patience and determination. Mr. O'Leary has learned that he has much more patience and determination than most people and has concluded that it pays.