Inshore lifeboat launched at 1054 to report of person jumped from M2 Motorway bridge, Rochester. ILB on scene at 1131, commenced search of river along with CG Helicopter 163 and Coastguard units and Police ashore, after a thorough search, the ILB was released at 1326 to return to station for crew change and refuel. ILB back on station at 1358. UK Coastguard advised that not re-tasking ILB, therefore it was rehoused at 1430. SE 1.