Why Team Robert weren't in the 2011 Land's End Trial

It's engineless! Team Robert were at this stage grubby but unbowed.
Close but so far away, it was a sterling effort by your brave boys but in the end our dream didn't come true. It all began to go wrong when Rob discovered what was making the funny tapping noise when he revved the engine on the Candidi Provocatore Allard. This machine is now under his stewardship and he discovered that a stud holding on the centre main bearing had broken, allowing the main bearing cap to fret about.
If you look closely you will see only one stud for the centre main cap. The other stud is in two pieces, one of which is still in the block. Rob tried drilling it out and did a good job but the main bearing cap would still need replacing. To get the replacement to fit the block properly, that would need line boring the block caps and that's an engine out and strip job. Doesn't the oil pump look vulnerable without the sump on?
This can sometimes happen on these engines if they...