In November 2010, Crown Court judge Jacqueline Davies, sitting with two magistrates, dismissed Chambers' appeal, saying that the electronic communication was "clearly menacing" and that airport staff were sufficiently concerned to report it.
Today, the Lord Chief Justice Lord Judge, sitting with Mr Justice Owen and Mr Justice Griffith Williams, said:
We have concluded that, on an objective assessment, the decision of the Crown Court that this 'tweet' constituted or included a message of a menacing character was not open to it.
On this basis, the appeal against conviction must be allowed.
More top news
Staying blustery for the next 24 hours with strong winds driving some rain, sleet and snow from west to east tonight.
The mother of murdered Boris Nemstov's girlfriend is worried her daughter is being treated as if she had something to do with the killing.
Student Charlie Mann was jailed for 16 months for the attack on his mother at their family home while high on Meow Meow.