Television presenter Rachel Riley has told a High Court judge that she worried about the security of her job after an aide to former Labour leader Jeremy Corbyn described her as "dangerous" and "stupid" in a tweet.

Ms Riley, 35, a numbers expert on Countdown, told Mr Justice Nicklin that Laura Murray's tweet in March 2019 "incited" hate and caused people to try to get her sacked.

Ms Riley has sued Ms Murray for libel and damages, saying the tweet caused "serious harm" to her reputation.

Ms Riley told a High Court trial that her agent had arranged a meeting with a programming head at Channel 4, and she had to explain that Ms Murray had "misrepresented" what she had written in an earlier tweet.

Ms Murray, who no longer works as an aide to Mr Corbyn, says in her defence that what she tweeted was true, and reflected her honestly held opinions.

Mr Justice Nicklin is overseeing a trial at the High Court in London, which began on Monday and is due to end tomorrow.

Ms Riley told the judge that she had a "hatred of anti-Semitism". She said she spoke out against anti-Semitism and thought the Corbyn-led Labour Party was "fostering ant-Semitism".

Ms Riley had initially posted a screenshot of a January 2019 tweet by Guardian columnist Owen Jones, about an attack on former British National Party leader Nick Griffin, which said: "I think sound life advice is, if you don't want eggs thrown at you, don't be a Nazi."

She had added "Good advice", with emojis of a red rose and an egg.

Later, Ms Murray tweeted: "Today Jeremy Corbyn went to his local mosque for Visit My Mosque Day, and was attacked by a Brexiteer. Rachel Riley tweets that Corbyn deserves to be violently attacked because he is a Nazi. This woman is as dangerous as she is stupid. Nobody should engage with her. Ever."

Mr Justice Nicklin ruled at an earlier hearing that Ms Murray's tweet was defamatory.

He has now been asked to consider whether serious harm was caused to Ms Riley's reputation, and whether Ms Murray had a defence of truth, honest opinion or public interest.

The TV presenter said a campaign had been initiated to "get me fired", as being "someone who had advocated violence", adding she had received "a great deal of abuse" and "most of it" was caused by Ms Murray's tweet.

In a written witness statement, Ms Riley said: "It is very upsetting to see how the... tweet incited such hate towards me and caused people to try to get me sacked from my job."

She also told the court that in a meeting with Mr Sayer, head of daytime programming at Channel 4, it was confirmed that the Channel 4 had "received numerous messages about me".

Ms Riley said she felt "vulnerable and worried about the security and longevity of my job".

The trial continues and Ms Murray is due to give evidence today.