Good to hear
Although some people might be a bit cynical about this, it's good to know that they are actually trying to do something to make sure that they are ready for when things go wrong.
I was talking to the chief exec of a local government body about 18 months ago, and he admitted that when they had such exercises, you could be forgiven for thinking no-one had ever heard of the plans, let alone read them. Even their regular fire drills would often show a poor state of preparedness.
But hopefully, this particular exercise will be used to develop a more practical test (or tests).