document: The 96-tonne crane exploded into a fireball just before 21:30 BST on Wednesday between J2 for Beaconsfield and J1a for the M25.
  A number of cars were trapped for several hours. The road partially re-opened on Thursday morning.
  Highways England said one lane would remain closed for safety reasons.
  Updates on this and other stories from Buckinghamshire
  It said the "intense fire" happened after a "significant spillage of hydraulic fluid", causing "serious damage to the road surface", which is due to be resurfaced on Thursday night.
  A specialist lifting team removed the crane from lane one and the hard shoulder earlier.
  Drivers near Beaconsfield are being advised to allow extra time for their journeys.
summary: Cars were trapped on the southbound M40 in Buckinghamshire overnight after a crane burst into flames, closing the motorway,