K arl Standley and his assistant Cameron Hutcheon have gathered in their usual spot in the south-west corner of Wembley Stadium clutching hot cups of tea. Standley is a coffee devotee but on matchdays, as a nod to his mum who enjoys a brew whatever the temperature, he mixes things up. After every kick-off the pair gaze out at 7,140 sq metres of glistening green perfection like lions surveying their savannah. Every thinkable controllable has been controlled and, for a short time at least, the teams – this time Manchester City and Southampton – have dual custody of the Wembley pitch. Standley – Wembley’s head of grounds and surface transitions – and his six-strong team are only halfway through a day that began eight hours prior, but the mountain has been scaled. The morning played out in front of the peaceful silence of 90,000 unoccupied seats. Dew was brushed from the playing surface.…