David Boothroyd wrote:

No it wasn't. It was a speculation by the LUL controllers as to what
could have happened to cause several different simultaneous incidents.

Why do they need to speculate ? If an explosion happens in a LUL tunnel,
it is going to create on almighty bang. Everybody within range will know about
it almost immediately. Don't they have cameras ? People who report to them ?
How come it took the LUL controlers 1h or so to find-out that it had been an
explosion ?

Richard [in PE12]