South Wales Electricity Plc’s is diversifying into cable television in a joint venture with International CableTel Inc, and looks for the venture to contribute at least 10% of group earnings by 2000: the company is investing up to UKP30m over several years for 40% of the venture, developing cable telephone and television services in three South Wales franchises; the company says it did not take a majority because it did not want to be in a managing position, although it did want a significant stake; it the first year, it expects its cable to pass some 25,000 homes in the first year – and 315,000 by the tenth.