A man has been arrested on suspicion of racially aggravated malicious communications over threats made to the businesswoman behind the Brexit legal challenge.

Gina Miller, 51, said last month that she had received a series of racist messages following her decision to spearhead a High Court challenge against the Government.

The Metropolitan Police said a 55-year-old man had been detained on Monday at an address in Swindon, Wiltshire, over the threats made online from November 3 onwards, before being released on bail.

Highly charged debate has surrounded the decision in the High Court that Parliamentary approval was required before Article 50 was triggered.

At the start of the Government's Supreme Court appeal against the ruling, Lord Neuberger, the court's president, warned that "legal powers" existed to deal with those making threats and abuse towards members of the public involved in the case.

Ms Miller has become the face of the first successful legal battle against Brexit, but told BBC Radio 5 live that she was "apparently the most-hated woman in Britain".

She said her high-profile role had led to death threats and she had spent £60,000 on security, but she has still been attending the Supreme Court battle, represented by Lord Pannick QC.