Baroness Tanni-Grey Thompson told ITV's Daybreak that "disabled people are being targeted" by the Government's so-called 'bedroom tax'.
She said: "Some of these changes are very, very painful, because they [disabled people] are not just going to be hit by this."
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Armed police have carried out a raid apparently linked to Wednesday's deadly terror attack in Westminster.
Cheryl Grimmer vanished from inside a beach shower block in Wollongong, Australia, in 1970, when she was just three.
Pc Keith Palmer was on the front line and because of his actions, the Westminster attacker was unable to kill anyone else.