I discuss a wide range of issues relating to the Coronavirus pandemic with both Cabinet colleagues and Scottish Government Ministers on a regular basis. When domestic certification was first identified as a potential strategy to support the Covid-19 response, and in order to respond to other States' requirements for international travel, there were a number of discussions, both at Ministerial and official level with all of the devolved administrations to look at both the possibility of a UK-wide certification solution, but also should this not be feasible to ensure technical interoperability between individual certification solutions where necessary. As public health is a devolved matter, the Scottish Government decided to develop its own vaccine certification mobile app, and to require its use in certain settings within Scotland. The Foreign, Commonwealth and Development Office has promoted the Scottish Government's app with governments internationally so that it is recognised at international borders. The UK Government Secretary of State for Health and his officials in DHSC and NHSx (which leads on digital health) continue to have weekly discussions with all of the devolved administrations to ensure alignment and interoperability on all elements of the Covid response. Should the UK Government decide to introduce domestic certification, we will continue to work with the devolved administrations to ensure interoperability, so that no citizen is impacted adversely when they travel across the UK.