Would it be possible to say, view the aerial photo of an area and use an apple pencil to circle a town or place enroute ( so you can avoid) and switch back to the uk caa/nats chart and see the circle / markup? ( avoid villages etc which are not already marked up). There is no way of identifying the places on the uk caa/nats charts. The circle / markup can then be erased with the pencil ( can be used iPad and Apple Pencil or android tablet and pencil)