Lightest tenkeyless keyboard?

Looking for a keyboard with the full complement of keys BAR the numeric pad, along with media keys (volume up/down, mute, play/pause, skip fwd/back). Must have the 6-key Insert-Home cluster (and not accessed via Fn keys, etc)

US or UK layout - UK layout preferred.

Can be wired or wireless. Primary requirement is that it has to be the lightest in terms of all-up weight (incl. batteries in the case of wireless, and inckuding the USB cable in the case of wired).