The 3rd spoke had snapped and been broken for a few days.
This 4th broken spoke was actually the nipple sheared off so should be easy to fix.
It was the very next one to the 3rd one which was still broken.
So at this point 2 spokes are broken.

We didn't ride on the 13th which was spent looking around Rabat.
As we were leaving Rabat on the 14th we found a bike shop and he gave me some nipples.
The photo below shows me tightening the replacement nipple and the wire taped to the chain stay to true the wheel.