Motorists traveling on the M25 this weekend are advised to anticipate significant delays due to a 10-mile closure from Junction 9 to Junction 10. The closure will begin on Friday evening and continue until Monday morning to facilitate the installation of a new bridge. The closure falls during the warmest period of the year thus far, with temperatures expected to reach 24°C, potentially increasing traffic volume. Traffic is expected to be diverted over a 19-mile route, potentially congesting local roads and complicating access to nearby attractions and major airports. Travelers are urged to use alternative routes or postpone their journeys if possible.