Mohiussunnath Chowdhury, 29, of Luton, was jailed for life with a minimum term of 25 years in July 2020 after planning a gun, knife and van massacre in the capital.
He was arrested after unknowingly revealing his plans to undercover police officers just days before 2019’s Pride in London parade, one of his targets.
The former Uber driver, who was said to be driven by “dreams of martyrdom”, also targeted tourist hotspots such as Madame Tussauds and an open-top sightseeing bus.
Chowdhury’s trial at Woolwich Crown Court heard that he prepared for his potential attack by lifting weights, practising stabbing, rehearsing beheading techniques, booking shooting range training and trying to acquire a real gun.
Three senior judges will consider Chowdhury’s appeal against his conviction at a hearing in London today.
They will also hear an appeal against the length of his minimum jail term.