Seems to be a very slow starter. It's still tiny, after almost four years. Hard to believe it has a reputation for exceeding nine feet in height. Maybe it needs more care and feeding than it has been getting, but all the other Teas have been in the same soil with the same (occasional) feeding and they range from medium-sized up to monster.
Will try giving this one some extra attention and see what happens.
Edit: Margaret reckons there are two different 'Lady Roberts' lurking in Australian nurseries, and it looks like I got the tiddler. It's a very nice rose. It's just a nice rose on a small bush, which I suppose I not necessarily a bad thing.