On Monday the 19th May there was a question about the regulation of offshore tax havens, particularly the Channel Islands. I intervened as this is an interesting example of the constitutional position of these islands. Their financial activities are now subject to examination by the the OECD (Organisation for Economic Co-operation and Development http://www.oecd.org/home/0,2987,en_2649_201185_1_1_1_1_1,00.html ) but the British Governments powers are restricted by the constitution

http://www.publications.parliament.uk/pa/ld200708/ldhansrd/text/80519-0001.htm#0805195000005