Completion of the thermal combustion chamber has been delayed by the liquidation of Mitchell Dryers who were building it, and the dispute about the patent isn't helping.
PHE is more likely to be a debtor in the books of Mitchell |Dryers because I believe they only paid a deposit up front for the work on the TCC, so they would presumably have to pay the balance before they can secure the TCC.
I might be wrong but I think they are still negotiating with the Mitchell Dryers liquidators to buy the TCC that is partially complete rather than having to start again.
I think we can forget Protos for the moment Castle, there has been no news update on the Protos Plastic Park web site since June last year! Nothing happening there, it's in limbo.