Yeahhh, if they are identified it's not just trespass, they'd actually potentially be determined to be in contempt of court. As
@JAperson pointed out
the 2018 High Court injunction does apply to anyone in future who trespasses on the site, it's
incredibly wide ranging. They'd be identified as the "sixth defendants" in the injunction:
The order states:
Many believe the orders posted on the entrances to Merlin attractions are to prevent Ally Law and co from trespassing, but they were served the order personally. The notice is actually to serve the order on potential "sixth defendants" (i.e. people who trespass in future):
Whether it's enforceable or not (I'm not sure if said copies in a transparent envelope are still there) is probably yet to be tested. But I'd be willing to put money on Merlin trying everything to ensure any identified would be put through the courts and therefore incurring hefty costs regardless.
As for Towers security, there's PIR detectors all over the shop that should trigger staff to look at cameras. Why they haven't I've no clue - there's a reason why these events are so few and far between though. Generally they're pretty on it.