I don't think so - any rating the person may have had is clearly expired. Even under the old national PPL, there would still have been a C of E requirement. With the training required to meet skills test standards and the requirement for a skills test too, I think the flights would have to be conducted from a licenced field.
However, don't take my word for it - a call to FCL will probably give a definitive answer...
Whopity - thanks. Will download a more up to date ANO...