Ummm... just read the first few pages of this thread - are you guys talking about boating on the non-tidal part??? Seriously, in a RIB? Hire a hardboat for the day or something
Rene, i'll happily show you the tidal part, through the thames barrier, past the houses of parliment, tower bridge etc. but i have little interest in taking my RIB upstream of Tedington (plus you need to buy a licence). The speed limit starts at Wandsworth Bridge, a few miles further upstream you get to Teddington where you need a licence... and a passport - seriously this is the first 'port' so if you have come accross the channel you don't need your pasport untill this point.