Viscount David Linley, son of the late Princess Margaret, designed the light-filled, cream-coloured, see-and-be-seen room.

BBC: Business trip: London

Watching and waiting to see if my son develops measles has shed a new light on the complexities of ethical decision making.

FORBES: Responsibility and the Ethics of Inoculation

But Mr Coll's inquiries have a serious purpose: to find out what light the family saga sheds on the radicalisation of its most infamous son.

ECONOMIST: The bin Laden family