The tinwork and such is easily repairable given enough money but putting a Centaurus back together after whatever it was that broke plus the shock loading of the arrival is a massive task. Maybe the RN have spare engine(s)?
Bear in mind the Centaurus is a fabulously complex sleeve-valve requiring the most minute tolerances not a simple agricultural american style radial. Few people around with the skills to do that sort of work too I imagine.
Still, coulda been worse.