Thank you everyone!
They were very quiet yesterday but have actually come to me this afternoon. Bobby has let me pluck out some his moult. Disaster trying to medicate Sable yesterday: she was in the hutch, low down and 3ft deep and I just couldn't get down to her properly. Today I gave it her on a tiny piece of bread - much better. I know she shouldn't have bread, but needs must. Unfortunately, I haven't got any basil.
With the aid of Bella's perching stool (she likes to sit on it in the open back door!) and a long handled broom I've managed to clean them out today. Ideally I need to make the hutch a bit higher so I can get to it, but it has to be low enough for them to be able to get in and out.