What is this?

[single]

I spotted this on Google maps on the east shore of flatholm but what is it?



Edit... I answered my own question!! https://www.google.co.uk/search?q=flat+Holm+project+boat&biw=1152&bih=727&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjK2K69k4_MAhVKOBQKHZUhBAgQ_AUIBigB#imgrc=CaeF5Ao8jswJsM%3A