After prime minister Boris Johnson declared an “omicron emergency” on Sunday night, as the new variant of Covid-19 continues to spread rapidly, people have rushed to order lateral flow tests online.

Lateral flow home test kits are unavailable on the Government website, as people wait to book a coronavirus vaccine. The Government website on Monday said “there are no more home tests available”. It ...

Lateral flow tests (LFTs) are widely used across healthcare, food safety and environmental monitoring, providing rapid, on-site results. But challenges with sensitivity, flexibility and usability ...