  FACT: The Home Office reports that migrants in the UK contribute £2.5 Billion to the UK economy   another fact     The bill for dealing with refugee claims has spiralled from £664million in 1997 to a staggering £2BILLION in 2004   http://www.derbygripe.co.uk/asylum4.htm  another fact     The cost to the NHS of treating asylum seekers and other immigrants with infectious diseases could be more than £1 billion for each year's arrivals.   http://www.derbygripe.co.uk/realuk/imhealth.htm    MAKE US 2.5billion  MINUS 2BILLION  MINUS 1BILLION  =COST US £500 MILLION