Think I was very lucky compared to Carsten as I was on an open road, doing around 40/50mph when my bevel box failed. All I experienced was a loud rattly noise like a shredded tyre flapping against the bodywork and then a real harsh scraping sound, like dragging a road cone (which it also felt like).
Now fitted with a replacement bevel box and it ran great again on the drive home from the dealers
Some other good news - my Morgan Rescue information and Emergency contact info arrived in the post today. Just a shame it didn't arrive a week earlier......
Here is a pic of the offending item. The dealer didn't strip it down, but thought it was a collapsed bearing. It still rotates, but grinds.