The 332 foot obstruction shown on the London Heliport chart in the AIP dated 18 Oct 12 has grown to 594 feet on the current SkyDemon chart. Presumably this is the tower with the crane that was hit. I think I saw a Garmin GPS on the panel of the Agusta in one of the pictures that has been posted / linked. Has anyone looked to see the height of the obstruction in the current Garmin database? If this was in use and up to date, it might have provided an obstruction warning.