To log this cache you will need to go to the published co-ordinates with your camera and photograph yourself on the big CCTV screen to your west, and get a photo like the one below. Or get an image of you and your GPS from the live webcam
Your GPS unit must be visible in your hand for the photo to count as a valid find.
You will have to time your visit to this area carefully as the big screen only shows CCTV footage intermittently so patience and perseverance are key . Luckily there are plenty of cafes and restaurants nearby were you can grab a bite to eat and something to drink whilst you wait for the live footage.