Replacement bus service running on First Great Western between Bourne End and Maidenhead due to problem with lineside equipment at Bourne End.
Journey times will be extended by up to 30 minutes. There is no current estimate for when a normal service will resume.
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The Airports Commission is to publish its report and recommendations on whether an extra runway should be built at Gatwick or Heathrow.
Wednesday morning's weather for the east of the region
Wednesday morning's weather for the west of the region