Top box key end stuck in the bottom of the lock barrel, any ideas?

[unfazed]

Since the box is open, remove the barrell and replace it. It is only held in with a clip. Loads of them on ebay for a tenner
http://www.ebay.co.uk/sch/i.html?_trksid...&_from=R40
Not sure about the Givi but most have a hole at the rear of the lock and you can push the key out.