I can confirm that recent media reports relate to a temporary requirement for certain high-speed passenger vessels to adhere to a 12 knot speed limit in central London.
So by the time they've finished the consultation, the commuter traffic on the river will be dead. More people back on the tube and roads.
And how many accidents on the river have been caused by speed? Probably same as the roads...bugger all.
We're back to the "Speed kills" idiocy again. Sheer genius, PLA.