Thalha Jubair, 19, from east London, and Owen Flowers, 18, from Walsall, were both arrested on Tuesday

The police say the hack caused "significant disruption" and "millions in losses" for TfL.

Thalha Jubair, 19, from east London, and Owen Flowers, 18, from Walsall, were both arrested on Tuesday

The alleged attack between August 31 and September 3 last year posed 'significant risk' to the UK economy and London residents, Westminster Magistrates' Court was told.

The attack against TfL caused ‘significant disruption and millions in losses.’