UK CAA PPL Solo hours validity period
So i know that once all ground exams are finished there is a 2 year window to complete flight training and do the actual skills test but what if some of the solo hours were done in the last 10 years are they still good or have some of them expired? Is there a window for the solo hours to be within a defined period of time? I've searched the CAA site but I cant find it. If anyone has a link to a document to reference for this that would be brilliant but my searches so far have yielded nothing