Insurance claims from earthquakes in Japan and New Zealand, floods in Australia and tornadoes in the United States drove Lloyd’s of London to its biggest-ever first half loss, the insurance market said Wednesday. Lloyd’s, which has no connection with Lloyds Banking Group PLC, said it received claims totaling 6.7 billion pounds ($10.5 billion) from the combined disasters. That led to a first-half pretax loss of 697 million pounds.