Lucinda Creighton: Varadkar and Sunak will need serious diplomacy to get a deal on the protocol

The exclusion of Mary Lou McDonald from a meeting last week handed Sinn Féin a propaganda victory; Dublin and London will have to work hard to avoid any similar incidents in what are sensitive and testing times

Almost 25 years after the signing of the Good Friday Agreement, the politics of Northern Ireland are as complex as ever.

While the peace delivered by the protracted negotiations of the early 1990s continues to be a remarkable success, it sometimes feels as though the politics remains stuck in a rut, characterised as it is by petty in-fighting, tribalism and ongoing sectarianism. It goes without saying that Brexit has exacerbated these problems.

Given the lack ...