Thanks for the information, that does seem to correspond to what I heard on the radio alright.
Out of interest though in times of high levels of holding how come the frequency isn't just split into holding and intermediate approach like at other airports with a holding controller?
Also how does two controllers work in practise, I assume they are both sitting next to each other? Who decides who gets to talk next, and how the plan is going to work as the frequency is full, there's hardly a gap to be had in transmissions for there to be time between the two of them to liaise.
Just curious as it seems like a rather unusual set up with two controllers, although obviously it works very well, LHR is the best controlled airport in the world in my experience, and perhaps if there are advantages in having two controllers work the same frequency it's a model that could be copied to other, less organised airports, but I'm at a loss at the moment to see why the frequency couldn't be split.