Access for every building in the UK comes and goes and changes all the time. It's an open area to walk round freely which you done already, there also always fishermen fishing there too.
So being new to the site, just couple of tips, never give dates as/when your thinking of going, this is an open forum, every Tom, Dock and Harry can view this without being a member, even security firms, local pickeys, police etc can view too (which alot of security firms do anyway)
Also being a newbie a lot of members will not share access information with you. Also like I said, being a open forum, we not post access info up at all.
So basically I would say, just go for a walk, take your camera and take whatever pictures you like, if there is access then great news but dont get your hopes up as a lot of times it might be a no go .