Thanks boxelder, that could be good. Not had a lot of luck repairing zips before but can you send some pics and what you'd be after for it to james.olsen.remote at hotmail.co.uk? If I can't do it Ortlieb probably can.
Hi James, The bag is outside the 5 year warranty (or the original one it replaced is). Send me your address and I'll post you it. If you think it's worth tackling/saving, feed the local bear.
Held flat the zip works fine, but not really when filled.