A Thai woman accused of insulting the royal family was jailed Tuesday for more than 43 years, a legal rights group said, the harshest punishment ever handed out under the country's strict lese majeste laws.

The verdict comes as Thailand ramps up its use of the controversial legislation against democracy protesters, whose demands include reforms to the ultra-powerful monarchy.

Ostensibly meant to shield the royal family from defamation, insults or threats, section 112 of the penal code is routinely interpreted to include any criticism of the monarchy.

On Tuesday, Anchan -- whose last name was withheld by human rights lawyers to protect her relatives -- was convicted on 29 counts of lese majeste and given a total of 87 years in prison.

The court halved her sentence because she had confessed, according to the Thai Lawyers for Human Rights group, which tracks royal defamation cases.

Anchan, a former civil servant, was first arrested in 2015 after being linked to underground podcast host known as "DJ Banpodj", a fiery critic of the monarchy.

A woman protesting against section 112 of Thailand's penal code, which deals with lese majeste at Victory Monument in Bangkok on January 16
A woman protesting against section 112 of Thailand's penal code, which deals with lese majeste at Victory Monument in Bangkok on January 16 AFP / Jack TAYLOR

She was initially kept in pre-trial detention for three years before being released on bail.

The previous longest sentence under the lese majeste law was the 35 years handed to a man in 2017.

Titipol Phakdeewanich, a political analyst from Ubon Ratchathani University, said Anchan's verdict could be "politically motivated" to intimidate activists.

But, he warned, such harsh implementation could backfire and "destroy the reputation of the institution of the monarchy domestically and internationally".

Abolishing the lese majeste law is one of the key demands of an ongoing youth-led protest movement.

Since the demonstrations kicked off in mid-July, more than 40 activists have been charged under lese majeste laws for taking part in protests demanding the overhaul of Premier Prayut Chan-O-Cha's government and reforms to the monarchy.

The Thai Lawyers for Human Rights group said Anchan had applied for bail pending an appeal against the sentence.

Thailand