Being a parent and working as a hostage negotiator don't immediately appear to have a lot in common, but someone who has been both says tricks she learnt in her profession can help you at home. Nicky Perfect spent over 30 years as a Metropolitan Police officer, including 10 years as an international hostage and crisis negotiator, in the elite New Scotland Yard Hostage and Crisis Negotiation Unit. At times, she says, knowing what to do or say as a parent, can feel high-stakes - the difference