Number crunchers over at the Office for National Statistics are being balloted for strike action over a requirement to come into the office for a whopping two days per week. Just over a thousand ONS staff were told late last year that they would need to spend 20% of their time in the office from January, ramping up to 40% in April. PCS general secretary Fran Heathcote is demanding “flexible and sustainable ways of working” instead of actually turning up. The bar for civil servants is on the floor…