I am of course talking about the boot. You might be supprised at what you can fit in it. When Sir Clive Sinclair said you can use it for shopping trips - he was right.
OK OK you cant do a weeks shopping for a family of 4, but you can get a shed load in if packed properly.
I get all my work gear - coat, scarf, gloves, shades, hat (gets cold at night), and all my grub.
If like me to start to use the C5 for work or shopping, you might find that carrier bags are no good, as they catch on the lock and rip. The solution is a Salisbury's Eco bag it fits perfect. It's made about some sort of hessian stuff and costs 99p.
The weight also stops the boot from clanging when you drive over bumps and pot holes (which seem to magically grow bigger on a C5)