Who are the Treasury Six?

Apparently, in the last month, six civil servants at the Treasury have handed in their resignations. It couldn't be all those "temporary" civil servants that make up Brown's "Council of Economic Advisers" by any chance could it? I mean, Gila Sacks only just took the job on!

I guess we'll know if there is an announcement of six recruits into a new Downing Street policy unit in the next few weeks? Having said this, they may all have quit because they really hate Alistair Darling, Jack Straw and Ed Balls and are getting out now before they have to work for one of them.