As previously mentioned our second demonstration is happening this Wednesday. Below is some more detailed information about the location and how to get there.
We will be demonstrating opposite the Iranian embassy (map). The embassy overlooks Hyde Park near the junction of Prince's Gate and Kensington Road, and our protest will be on the opposite the embassy on Kensington Road (i.e. the Hyde Park side).
The nearest tube stations are South Kensington and Knightsbridge. Prince's Gate is effectively the top part of Exhibition Road, so from South Ken tube follow the signs towards the Science Museum which will take you into Exhibition Road, then keep going till you hit the park - you'll see the embassy on your right. To get a route to the embassy by tube or other public transport go to TFL's journey plannner and enter your destination as "Iranian Embassy" (marking it as a 'place of interest').
We have a few placards, but do bring your own if you can. If anyone's unsure what to put on their placard the sort of slogans we've gone with are:
Free the Navy 15 / Hostages
Iran kidnap shame
No state kidnapping
Honk for (the Navy 15 / Navy hostages)
Let them go!