I thought I would post this for anyone who is stuck at an event.

Seat post fail only noticed the day before we flew to Mexico for the ITU worlds so no chance for a proper fix.

Picked up the twine from Home Depot and did what I call a French Whip from the top of the seat post

towards the bottom I then whiped back over the original to give a good "knuckle"

Was then able to go to the local market in Cozumel and bought some superglue.

The fix should be reversible for my inevitable conversation with Specialized NZ.

I will tape the who,e thing in electrical tape just for appearances.

Hope this helps someone.