A 13-year-old boy is reported missing after going swimming off the East Yorkshire coast near Hornsea. Multiple agencies are involved in a live search and rescue operation, with police coordinating efforts alongside coastguard and lifeboat personnel. The incident is centered on the coastline in the Hornsea area, where emergency responders mobilise to locate the teenager. Reports indicate that the search includes personnel from the police, the coastguard service, and the RNLI, with vessels and other resources deployed as part of the ongoing operation. Authorities are continuing to assess the situation and expand the search as needed, while responders work to find the missing boy. The story is being reported as an active, developing incident, with the scale of the response reflecting the seriousness of a person missing at sea or in the coastal waters. Updates continue as the search progresses.