I just sent them a fax saying that I could not undertake the flight as I did not have the 20 hours on type required by the insurance. The new owner immediately rang and asked who had told me that I needed 20 hours on type - I told him that the insurance themselves had confirmed this to me, and that they had been told that I had the necessary experience. There followed a short pause, then a promise to "call me back". Have heard nothing more as yet...