Just what goes into to the making of a super sandwich?  We've gathered together a few eye-witness reports, examined a number of aerial photographs and spoken to that annoying bloke off the telly who says 'pukka' a lot.  And this is what we've come up with.

Admittedly, a lot of guesswork has been involved here, but we're reasonably confident that the rough floor plan below is an accurate prediction of how the final sandwich will turn out.

Key:

1	Upper crust, with weatherproofing and solar powered cooling vents.	2	Assorted spiced meat off-cuts
3	Observation deck	4	A flange of pressed gammon
5	Middle crust, for extra stability, and to insulate the lower levels from spontaneous lightening strikes.	6	Compressed gherkins, set in a special polymer resin to absorb the heat during re-entry.
7	M&Ms, chopped Mars Bars and Peanut butter.  This level was put together by the children of the Woodlands Elementary School in Chester as part of their 'Design a Layer for the Big Sandwich' competition.	8	Classified
9	Braised lizard skin, salted, spiced and then delicately taunted by one of France's top chefs for over three hours.	10	Foundation layer, incorporating boiler room.