Secret Firework Display in Victoria Dock

On Saturday there was a large industrial barge type vessel moored on the edge of Victoria Dock and its deck was being prepared full of public display grade fireworks from a large van which had parked alongside. This firework display was let off in the middle of the dock at approx 7pm the same evening. It was quite a display considering that at most I could only see about a dozen people around the dock who witnessed them (brought out mainly by the noise they were making). I can only presume that this might have been a private display for a resident who lives dockside maybe? Anyone know more? Whoever was responsible... thanks, they were great!