When you have a newly formed remote team that has to deliver a system in a high stakes environment – including short deadlines, high visibility (especially for failure), limited knowledge of some of the technologies to use, and some hard security and accessibility constraints – remote mob programming might not be at the top of your list of methods to use. Yet, this is what we did to deliver successfully, and to high-quality standards, one of the backend systems used by the COVID-19 app – the covid app used in England and Wales. (Agile Manchester 2023 version)