A businessman who caused "carnage" in a four-vehicle crash while using a mobile phone has been jailed.
Michael Bradshaw's BMW drifted on to the wrong side of the road when he was text messaging.
He narrowly missed two on-coming cars before colliding with a Subaru, a moped and a Toyota.
The 16-year-old schoolboy moped rider suffered a fractured skull, a punctured lung, a cracked sternum and a cracked eye-socket.
The Toyota driver suffered injuries including whiplash and soft tissue damage.
The crash happened on the A6, as Bradshaw was approaching a roundabout near Market Harborough, travelling from Leicester, at 4.45pm, on January 12 last year.
The 40-year-old married father, who is global contacts director for a construction company, admitted driving dangerously.
Bradshaw, who was due to have surgery to remove a brain tumour this week, was jailed for four months.
Alan Murphy, prosecuting, said Bradshaw had no previous convictions and a clean driving licence.
He told the police a "sudden flash of light" caused him to swerve, although no-one else at the scene saw it.
Bradshaw, of Barford Close, Westbrook, Warrington, initially denied using his phone but analysis of his mobile activity proved otherwise.
Bradshaw was banned from driving for 18 months.
