...sorry, I forgot to mention that I'm after a bare boat charter! I'm not sure if Chas Newens do bare boat charters.
The reason I want a bare boat charter is that it's supposed to be half a dozen of us who work together every day relaxing. The plan is to pootle upriver and moor up next to a pub for lunch, then pootle back down again. It's just a bit weird having some random punter in a small enclosed space with us, especially over lunch.
Also, as far as I know, there is a 30 knot speed limit between St Saviour's Dock and Margaretness, with the proviso that you are not doing anything dangerous, stupid or annoying to other users. A similarly limit of 25 knots exists between Lambeth and Wandsworth Bridges. At least, that was the case when I did my PBL2 on the Thames a couple of years ago. Not that I'm planning on going crazy on the river, but in case other readers see this I thought we should clarify a bit. They may have recently changed that, so please let me know if that's the case.