Yr eitem gyntaf ar yr agenda oedd adroddiad gan Brif Weinidog y DU (yng nghwmni'r Cynghorydd ar Ddiogelwch Gwladol, Syr Mark Sedwill) yn rhoi'r wybodaeth ddiweddaraf am amgylchiadau'r gwenwyno yng Nghaersallog ac ymateb Llywodraeth y DU, yr oedd newydd ei gyflwyno yn Nhŷ'r Cyffredin. Ar ran Llywodraeth Cymru, mynegais fy nghefnogaeth lwyr i ymateb cadarn a chymesur Llywodraeth y DU, a phryder aruthrol am y gweithredoedd di-hid a chwbl annerbyniol yr ymddengys i Rwsia eu cyflawni; ar wahân i unrhyw beth arall, roedd nifer o bobl ddiniwed wedi'u peryglu'n ddifrifol gan y gweithredoedd hyn. Mynegodd Nicola Sturgeon ymateb tebyg, ac fe fydd hi a minnau'n parhau i gael yr wybodaeth ddiweddaraf am unrhyw ddatblygiadau yn ôl yr angen ar delerau'r Cyfrin Gyngor.
The first agenda item was an update from the Prime Minister (who was joined for this item by the National Security Adviser, Sir Mark Sedwill) on the circumstances of the recent Salisbury poisoning incident and the UK Government’s response, which she had just given in the House of Commons. On behalf of the Welsh Government I expressed strong support for the Government’s robust and proportionate response, and expressed my enormous concern at the reckless and wholly unacceptable action that Russia appeared to have taken; quite apart from anything else, many innocent people had been placed seriously at risk by this action. Nicola Sturgeon spoke to the same effect, and both she and I will continue to be briefed as necessary on Privy Council terms on future developments.