It's that time of year again, when resolutions are made, gyms are joined and we all try to shed the fifty or so stone we gained over Christmas. All this must mean that Operation Transformation is back on the box, with five brand new leaders to inspire the nation. Katherine Thomas will be back on hosting duties while fitness expert Karl Henry, principal clinical psychologist Dr Eddie Murphy, dietician Aoife Hearne and GP Dr Ciara Kelly will be on hand to dispense help and advice. As an added incentive this year, the participants' houses and fridges are fitted with webcams to catch them out if they slip back into bad habits.