It had been expected that the Chancellor of the Duchy of Lancaster, the Rt Hon Michael Gove MP, would lead the UK Government delegation, but he withdrew the day before.
Roedd disgwyl y byddai Canghellor Dugiaeth Caerhirfryn, y Gwir Anrhydeddus Michael Gove AS, yn arwain dirprwyaeth Llywodraeth y DU, ond tynnodd yn ôl y diwrnod cynt.