LM said, "
As far as I know, that didn't have a contra-rotating prop".
I think that came from the page you got the image from, the page below shows the projected torpedo bomber with the contra-props, although neither got built.
AeroScale :: British Secret Projects of WW2. Vol 2 by Peter Allen
Thanks for the offer Graeme, but I can't post until I get my home internet sorted. Anyhow, you got it fair dinkum mate
no excuses, but I will be takling to my IT guys about their backup schedules and auto shutdown!