“If you want to see the disgusting ghost town of a former great place, come here, otherwise...”
Another review calls it's "A shadow of its former self", which is actually praising it too highly.
The stinky market-place like entrance with its stalls selling mobile-phone covers is literally as good as it gets. Venture past them and you reach the escalators that do not work, which lead up to a dark second floor, which from the ground floor looks like it's shut but somebody forgot to erect the "No entry" signs. We were literally unsure whether we were allowed to venture up the escalators, but we did. The second floor is no better. There are a few crap old video games, more stalls selling utter crap and one or two crap cafes, from which I would never purchase or consume food.
From this floor you have a "vantage" point where you can look up and around and see the decayed shell of the place. We can see more escalators, but they go nowhere. The entrance to them is closed off and you can see the next floor up is a collection of boarded-up entrances and removed facades, exposing the metal structure of the building, loose wiring, panels hanging off etc. There are barely any lights on anywhere, it's freezing cold, there were no people, the "facilities" were unmanned, leaving an impression that you have accidentaly walked into an unsafe building site. We expected to be told at any moment that we were in a closed-off area and to get out.
If you have a spare 10 minutes to literally walk in, walk up the escalators (with their wobbly steps), turn round and come back, then you too can write a review like this. Otherwise, save yourself ten minutes and go and do something else.
Considering the name at least is famous and it has a good history, this place is now literally an embarrassment to London and given it's prominent location the Mayor should step in and have the place compulsorily purchased and renovated into a facility owned by the city.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.