- Jack Wilshere returned to the field after being treated and played on until the 59th minute
- But Arsenal followed-up the FA's initial scans and found a fracture which will see the midfielder miss the next six weeks
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Paramedics were on standby outside the police cordon as armed officers stood by the property.
A team of researchers has taken samples from the ten busiest London Underground lines to work out which are the dirtiest.
The action comes on top of an emergency timetable which has seen hundreds of trains a day being axed.