A few days ago Collins posted an update to the controversy revealing that the entrance to NC2 has recently been sealed shut with an iron gate, there by barring entry to the so-called ‘Giza Caves’.
Although from the photos the gate appears to be cemented in place and not moveable there is some speculation over whether or not this is a permanent fixture. Collins points to a padlock that can be seen still sealed in it’s plastic wrapping on the side of the gate.
The other tombs NC1 and NC3 have apperently also been fitting with similar metal gates.
See the above page for more, including a link to the full story on Collins's website.