At this point we are not sure if it will be a two or three tier affair, (my back might be a major factor in that decision!), but regardless, it will be a fun place to grow and pick our cherry tomatos in years to come.
The rocks will probably be materially covered in an ivy 'donated' by a "major Canadian University", (we're sure they haven't missed these cuttings "borrowed" from one of their academic buildings). Mar has gently nursed these cuttings, (she talks to them), all summer in a mug of water on her desk, and they are now happily sending out some very healthy roots.
Gotta run .... Scruff wants to go and fetch more rocks .....