Dick, as some of the other ATCO's have said on here it goes against the grain to say this, but well done.
On the ATCO unqualified break relief and staffing issue (not wanting to hijack this very important thread just explaining one quick thing), it needs to be understood that ASA have not intentionally ended up with not enough ATCOs. Yes some management decisions in the past have meant they have been misguided into thinking they weren't short staffed when they actually were but over and above that there is a chronic world shortage of ATCOs and it is only getting worse.
The reality is that when a suitable person looks at ATC as a career, they look at a failure rate of at least 50%, shift work on horrible rosters for the next 25 years, extremely low training salary that just keeps you above the poverty line (in the US the trainees actually have to get a second job to try to stay above water), and for the most part these people have so many other high paid options with less risk that they forget about ATC as a career.
Anyway sorry for the diversion from the thread, well done and hopefully this may be a wake up call for ASA (but don't hold your breath!)