I've signed up again for this. My first and only time was in 2008 aged 20! Been busy since but always had that what if in the back of my head. Can't say it would be ideal to get posted far away from my home, especially owning a house and having a wife now. I'd happily commute down to London so would prefer to be on approach if I ever did make that stage.
It seems things have changed since I last did it, I've just had the invite to complete the selection test online, I take it this is a new thing?