In previous years the route has kinda been London Eye to start with, then onto Trafalgar Square and Covent Garden, with a few short stops inbetween if we find anywhere interesting or get stopped for photos.
Not that we have to do the same again but I would have thought the following to be a rough guide. Difficult to say I know as its easy to get stuck at a particularly good spot, or get bored and move on quickly:
London Eye 4.00-6.00 ish, for most people to meet. A few of us will be there earlier and can meet elsewhere or wander up and down the embankment for a bit.
Then onto Trafalgar, maybe somewhere 7.00 - 8.00 ish
Then Covent Garden up until 10.00 or so, when people will start to leave or for the later ones move on somewhere else.
I am by no means attempting to organise a fixed schedule, so please shout if you have any other ideas.
David, sounds like you will probably be getting there when we are moving around so I suspect we will need to text where on the night.