The NHS issues an alert advising households in the UK to close windows and doors until Friday, following an updated weather forecast from the Met Office. The guidance is presented as a precaution for people who may be affected by conditions expected during the week. The Mirror and Daily Express both report that the NHS urges the public to take practical steps to reduce exposure, specifically by keeping windows and doors closed during the advised period. Both outlets frame the alert as a response to the forecast’s likelihood of triggering flare-ups for some people. The coverage indicates the advice is time-limited, running until Friday June 19. While the reports do not provide detailed medical eligibility criteria, they consistently describe the message as NHS public health guidance tied to anticipated weather-related impacts. The alert encourages affected individuals and the wider public to follow the NHS recommendations throughout the specified timeframe.