Having browsed the forums about insurance over the last few days I figured it was worth a quick call to my broker to explore the easy and obvious solution and get a quote from Chaucer for providing me with a green card covering the Morocco leg of the trip. The quote I received was not quite what I expected, had no mention of a financial transaction and is written verbatim below:

"Under No Circumstances"

I guess this leaves me looking for a different insurer since my renewal is due before the trip anyway and there seems to be some hope that Norwich Union or Zenith may be able to provide cover and the green card to ease my passage.