18:00Six O'Clock News27/03/2017 Westminster attacker's mother speaks of shockBBC Radio 4 Duration: 30 minutes Mon 27th Mar 2017, 18:00 on BBC Radio 4 FMAvailable for over a yearListen nowPolice say no evidence of link between Westminster attacker and terror groupsGenresNewsFormatsBulletinsBrandSix O'Clock News Source: BBC Online