I am just surprised that they do not know which plants are on the site. I would have thought all responsible similar sites would be aware already. The statement as to the possible medical uses of plants there is somewhat late. The Chelsea Physic Garden, which I visited some years ago, was established for medical purposes in the 1670s. Would be interested in knowing what is proposed in the "redevelopment" mentioned. I hope it will in future not concentrate on moneymaking corporate events, while selling off small portions for development . I note the aviary was only established in the 1990s