NEC ECC: Contract not paid suppliers and lost plant/equipment

The Contractor has not paid its suppliers and a plant which was being used to complete the works has gone missing and the Contractor could not explain where its gone.

What am I able to do regarding the Contractor becoming insolvent/bankrupt although currently he isn’t but may be. Also, what options can I take regarding the item the Contractors lost?

This is under NEC4 ECC.

Please can you confirm which main Option of the NEC4 ECC applies?

Option A. However, I would like to know the answer of other options too just to have a better understanding if there is different outcomes

In your question you state plant by which I assume you mean Equipment.

You don’t say if your concerns extend to the Contractor not performing on site progressing the works.

I suggest that if the Contractor is not performing you notify an early warning and have an open discussion.