Is this because it could be a useful bargaining chip in some future negotiation with the DUP?

BBC: Promises easy to make in opposition

But on the big question of whether or not the Palestinians are going to be in a position to demand from themselves that they meet the requirements of ending violence so that something can happen in terms of a future negotiation, this was a very important step today.

NPR: Understanding the Gaza Border-Crossing Deal

In fact, if you choose, you can sum up the issues involved in this negotiation in terms of differing views on the relative importance of the past and the future.

BBC: Durban: Climate summit looks back and forward

While each year the heads of state sing from the same hymn sheet in praise of scientific research as a vehicle to achieve the objectives of growth and full employment, the first cuts proposed to the future European budget under negotiation yesterday were in this field.

BBC: NEWS | Europe | EU's 'Waterloo' summit angers press