A quick Google search found this from Mat 2018:
The hard left Labour leader revealed both he and some Labour MPs would prefer it if the monarchy was abolished.
In a controversial interview, Mr Corbyn said: “I think it’s time that we just moved on.”
“When the Queen completes her reign, wouldn’t that be an appropriate time to call it a day
and have an elected Head of State?” asked Mr Corbyn. “A large majority of Labour MPs
would like to see a change in the attitude of the monarchy and the way the Royal Family operates.”
Corbyn, who was a backbench MP when he made the comments on GMTV in 2001
– revealed that Republicans were a ‘minority’ in the Labour Party.
He predicted the public mood would shift as “public opinion moves more in favour of a complete democracy”.
Sixteen years later, Mr Corbyn’s predictions failed to come true. Earlier this year it was
revealed that 65% of Brits think that the UK should keep the monarchy and Only 19% wanted Britain to become a republic.
27% thought that the Monarchy was a ‘meaningless institution’ and 65% thought there was
still a place for the Monarchy in modern Britain. 70% thought that Britain was perceived more positively abroad due to the Royal Family.
So, it wasn't a lie afterall. It was just old news. Sorry suziewoozie.