Ym Mrwsel, siaradais mewn seminar a drefnwyd ar y cyd gan y Ganolfan Polisïau Ewropeaidd a Chanolfan Llywodraethiant Cymru ar safbwynt Cymru, yr Alban a Gogledd Iwerddon ar Brexit. Y siaradwyr eraill oedd Mike Russell, Gweinidog Llywodraeth yr Alban dros Drafodaethau’r DU ar Sefyllfa yr Alban yn Ewrop a Cathy Gormley-Heenan, Dirprwy Is-ganghellor Prifysgol Ulster. Yn y seminar, roedd ymhell dros gant o gyfranogwyr o'r Sefydliadau Ewropeaidd, Llysgenadaethau a swyddfeydd rhanbarthol a sefydliadau ymchwil, yn ogystal ag aelodau o Bwyllgor Materion Ewropeaidd ac Allanol y Cynulliad.
In Brussels, I spoke at a seminar arranged jointly by the European Policy Centre and the Wales Governance Centre on ‘How Scotland, Wales and Northern Ireland view Brexit’.  Other speakers were Mike Russell, the Scottish Government’s Minister for UK Negotiations on Scotland’s Place in Europe and Cathy Gormley-Heenan, Pro-Vice Chancellor of the University of Ulster. The seminar was attended by well over a hundred participants from the European Institutions, Embassies and regional offices and research institutes, as well as members of the Assembly’s European and External Affairs Committee.