A new group within the TUI is calling for the teachers' union to pull out of the Lansdowne Road Agreement.

"Grassroots TUI" is formally launching in Dublin today.

It's aimed at reforming the union, and forcing the leadership to take a tougher stance with the government.

The group says grassroots members are also angry about having to pass picket lines of their ASTI colleagues.

However, spokesperson Eddie Conlon rejects suggestions that they're a breakaway union: