© licensed to London News Pictures.  24/05/2011. London, UK. A memorial service at a park in Chiswick, London today (25/04/2011) for Isobel Reilly who died on Sunday Morning.  Isobel became unwell at a house party in North Kensington before being rushed to hospital where she died. Police are treating her death as "unexplained", but officers were investigating whether she died after taking drugs. Please see special instructions for usage rates. Photo credit should read Ben Cawthra/LNP