WELSH First Minister Mark Drakeford said there were “many practical and ethical issues” around the introduction of vaccine passports.

“I discussed this yesterday with Michael Gove, the minister in charge of the Cabinet Office, and the first ministers of Scotland and Northern Ireland,” Mr Drakeford told the Welsh Government briefing.

“We continue to work together on the issue of vaccine certification.

"There are positive prizes to be won from having a successful vaccine certification scheme but there are many practical and ethical issues that will need to be addressed and resolved successfully if those positive opportunities can be won from it.

“They are complex, but we are engaged on it together.

“We do have independent powers on all four nations on this matter but the fact we are discussing it regularly together, I think, improves the opportunity for us all to address those complex issues in a way that reaches some common solutions.”

Dr Frank Atherton, Wales' chief medical officer, said: “In terms of the science we are in fairly uncharted territory with some of this.

“I can see that for international travel it may well be that vaccine certificates are required because other countries may require them.

“Use in domestic settings, for example going into venues, I think is far more tentative. There are lots of details that would need to be worked through on that.

“I would also worry about the equity concerns around that because some people won’t be able to be vaccinated or choose not to be vaccinated.

“We know the vaccines don’t give 100 per cent protection, so it would raise the prospect that some people cannot be vaccinated and get excluded from parts of life.”

Mr Drakeford also alleviated some concerns about those being offered vaccines ahead of anticipated delays that have been reported in the media.

The Labour leader said that the nation did has enough supply to complete vaccination for all top nine priority groups and delays should not be a cause for concern for those waiting on appointments for first and second doses.

He added that over three quarters of people aged between 55-59 have already had their vaccination.

He went on to say that over half of people aged 50-54 have been vaccinated and that the appointment system will be "concentrating hard" on the bottom end of 50s bracket this Bank Holiday weekend.

He used this time to clarify that "it’s never too late in Wales" for anybody who may not have been called, adding that people in the priority groups should come forward if they have been missed and they'll be given an appointment as soon as possible.