The Tate & Lyle sugar silo on the dock road. Originally built to bring in sugar from ships at Huskisson Dock but now derelict (so far as I can tell – these pictures of the inside of the silo from the URBEX forums would seem to suggest so), English Heritage have a photo essay on the construction of this building. It’s a very unusual building design wise and has Grade II listed status.
Wow, that place looks awesome, be great to do a load of shots round there, lets get in it!