Jayne Ozanne has refused to accept an apology from the Church of England after the Synod voted in favour of blessing same sex unions rather than allowing same sex marriages.
The Guernsey born, UK based campaigner for equal rights was seen as one of the leading voices in the opposition to the decision made yesterday.
Ms Ozanne, a former advisor to the UK's government on LGBT issues, had tried to amend the controversial policy which set out the plans to allow blessings but not marriages.
Her amendment was blocked by Bishops without debate at the Synod earlier this week, something which she said left her shocked.
Further, Ms Ozanne has said she is "deeply disappointed by the way the conservatives have consistently sought to undermine those of us who sought to move towards a Church of England that could embrace a plurality of views on sexuality.
"By continuing to tell LGB people that they cannot hope to get married any time soon in their church or that their desire for sexual intimacy is sinful, we send a message to the nation that few will understand.
"More importantly it is a message that will continue to cause great harm to the LGBT community and put young LGBT+ lives at risk."
Ms Ozanne has previously campaigned against the continued legality of conversion therapy in the UK.
In acknowledging an apology that the Church has offered to same sex couples, Ms Ozanne said that it is "meaningless".
Realising that her efforts to try and sway the vote towards the future acceptance of same sex marriages within the Church, Ms Ozanne said she abstained from the final vote.
"I did not want to block a tiny step forward that some will welcome (blessings). However, I personally will not be forced to eat breadcrumbs, on which I fear so many will choke."