A former Uber driver and his sister have appeared in court accused of plotting a terror attack and failing to disclose information.

Mohiussunnath Chowdhury, 28, is accused of accused of preparing acts of terrorism and his sister Sneha Chowdhury, 25, is accused of failing to disclose information.

The pair were arrested following a vehicle stop in Luton on July 3 as part of an investigation by the Scotland Yard's Counter-Terrorism Command.

A brother and sister from Luton have appeared at Westminster Magistrates Court (pictured) on terror charges this morning

It is alleged that between January 12 and July 3 this year, Mohiussunnath booked a firearms training course, requested and selected a firearm and researched potential attack targets and asked another person to do the same.

It is also alleged that he undertook weight and fitness training, martial arts training and purchased and trained with wooden training swords called bokkens.

Mohiussunnath, a university drop out and former Amazon delivery driver and Uber driver, is charged under the Terrorism Act 2006.

Chowdhury's sister Sneha was bailed today

He also allegedly disseminated a terrorist video called 'The Establishment of the Islamic State Pt 6' on March 19 this year, also contrary to the Terrorism Act 2006.

A third charge accuses him of possession of an ISIS instructional manual called 'Guidelines for doing just terror operations' on July 3 this year.

His sister Sneha Chowdhury is accused of two charges of failing to disclose information about terrorism between 24 January 24 and July 3 this year.

It is alleged she had information which she believed might be of assistance in preventing an act of terrorism and failed to disclose the information as soon as reasonably practicable to a police officer.

District Judge Vanessa Baraitser today remanded Mohiussunnath Chowdhury in custody, but bailed his sister under a number of conditions.

They will appear at the Old Bailey on July 29.