 Broadcasters, telecom firms, and banks were among the many businesses that reported issues today, although it was not immediately clear what was causing each issue. The London Stock Exchange said technical issues with its RNS news service were being investigated, and Sky News, owned by CNBC parent company Comcast, was temporarily off the air this morning. Meanwhile, airports around the world have reported delays as a result of technical faults, and some planes have been grounded. Spain's airport authority...