Peers are debating former Labour Lord Chancellor Lord Falconer's assisted dying bill.
The Bill proposes allowing doctors to give a lethal dose to terminally ill patients judged to have less than six months to live.
A survey conducted for ITV's Tonight programme found 70% would support allowing assisted dying under the framework outlined by the Assisted Dying Bill.
The former Archbishop of Canterbury's decision to support legalising assisted suicide is a "step in the right direction", the widow of locked-in syndrome sufferer Tony Nicklinson has told ITV News.
Jane Nicklinson said: "I think the fact that [Lord Carey] has come out and said his feelings have changed, a lot more in the church will come out".
Ahead of tomorrow's Lords debate on assisted peers, Tonight speaks to those arguing passionately for and against the Bill.
Chris Woodhead, the ex-Ofsted chief who suffers from motor neurone disease, has made an emotional call for assisted dying to be legalised.
Lord Falconer insists his Bill will provide clarity to fix Britain's "broken" laws around assisted death whilst protecting the vulnerable.