How much do you trust your desk officer? I'm pretty sure that if mine got a whiff of the fact that I was shortly to submit a PVR request, he wouldn't be considering me for the location or posts he is currently. He might decide that tasty one year post pushing paper around High Wycombe might I have just found a candidate!
In short, I don't think one can count on one's "Career Manager" for impartial advice.