It's got to be it.
Either the clue means get on the Clipper and its as we've discussed.
Or it's a case of getting on the clipper, getting off after four stops/locks/bridges/something - and then it's somewhere on the right.
Last time I looked, somewhere on the right was a very big area to cover.
Still don't understand the Kemble aspect of the clue... except the fact that the clippers run on the Thames... but that just seems to be trying too hard to fit with the clue.
My wife and I was on one of these in September. As I recall when you enter the clipper there are a number of rows of seats towards the front. Could the "come forward 4 times" mean, on entry go forward four rows?
There was once a token (hidden isis) under a chair on a railway carriage, maybe its under a chair on the boat.
I'm off to see The Spice Girls tonight with daughters and her friends so I could take a look ,
But the only problem is there are so many clippers. Typhoon, Tornado, Cyclone, Monsoon, Sun, Moon, Hurricane, Sky, Storm and Star Clipper.
and they come every 15mins or so.
So you could wait 2 1/2 hours for the right one to come along