I have just done it. I PVR'd then used my resettlement to "learn the ropes" for my new job in Spain, notionally unpaid, although I received an advance of my removals fees and disturbance package (a relocation grant from new employer)
Once I was on my final leave and terminal leave etc I received my first pay packet with a golden hello!
All taxed though...
So for 2 months I received double pay (3 if you include the relocation grants)
If you want to do this route there is a form you need to get from the Education Centre, which you and your new employer sign which states you will not receive any payment during your work experience / induction training period as it is deemed to be part of resettlement and therefore still paid military service.