Nathaniel Okusanya, received a life sentence with a minimum term of 20 years.
Nelson Idiabeta, detained at her majesty's pleasure, received a minimum term 19 years
Passing sentence his honour Judge Marks QC told the two teenagers:
"You have shown not one iota of remorse, both of you seeking to brazen it out in front of a jury."
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Scotland Yard confirm that two people arrested in connection with the attack on Westminster have been released with no further action
An appeal to support the family of murdered policeman Keith Palmer has reached more than £700,000 in two days.
PC Keith Palmer will be remembered permanently at the National Memorial Arboretum, Home Secretary Amber Rudd has said.