Mairead Philpott's appeal at Nottingham Crown Court is the first to be televised outside of London.
The law was changed to allow cameras into the Court of Appeal last month, and today's case is set to be the most high-profile to be broadcast so far.
Philpott is appealing a jail term of 17 years for the manslaughter of her children in a house fire in Derby last year.
More top news
Emergency services are attending a massive shop explosion in Leicester. Witnesses say the debris was "blasting across carriageways".
Emergency services have declared a "major incident" in Leicester following reports of an explosion.
Police investigating the murder of man in Leicester on Saturday morning are urging motorists who were in the area to get in touch.