I dropped by there very recently and went for a little look around.
It's possibly the best boarded-up building I've ever seen. Frankly, I'm just surprised anyone would spend that much money on stopping people from accessing a place. Usually owners will have wooden boards screwed over windows and doors, but not here! Every way in is either a locked metal door, or has been blocked up with cemented breeze blocks. Even the upper floor windows (which are only accessible with a ladder or some pretty funky climbing trickery) have been been filled in with breeze blocks. Whoever owns the building really doesn't want people getting in there.
That said, nothing is impossible and I'm sure one could get inside if they really really wanted to, but doing so would require breaking down a door or cutting through a lock, which certainly isn't what urban exploring is all about. Personally, I'd advise giving this spot a miss and accepting that no-one is getting in there any time soon.