Ten ways to... Spot unhappy staff

1. They arrive just in time for elevenses
2. They're aloof
3. It's six months since their last idea
4. They keep ducking out with their mobile
5. Doctor's appointments are on the up
6. There's an interview suit in the cupboard
7. Their workload is a struggle
8. They've become over-sensitive
9. Working longer hours isn't helping
10. HR would like a word with you...