Danish nurses continue wildcat stoppages in defiance of unions over pay and lack of staff, joined by sympathy strike of Silkeborg social workers; teachers across France walk out for 24 hours to demand more staff, better pay and conditions; Sunday pay strikes at ScotRail continue for over six months, 24-hour safety strikes continue at East Midlands Rail; Nigerian resident doctors on strike for nearly two months over pay arrears, while other health unions prevaricate about calling members out over same issues