Lady Gaga mesmerised a sellout 23,000 crowd with her talent and energy at the Manchester Co-op Live Arena this week. Three miles away, in an arena devoid of all energy and life, a different lady who went gaga many years ago had the sparse crowd pining for the past. Lady Thatcher haunted this year’s funereal Tory conference like a mocking ghost. At the entrance stood three glass cages housing her power suits, there was a giant mosaic of her face, and a Thatcher Theatre. Stalls were selling