Surprisingly British Telecommunications Plc’s BT Internet service, launched at the end of this month, does not include access to Netscape Communications Corp’s Navigator. Instead users will have an enhanced Mosaic browser from FTP Software Inc. ‘Commercial reasons’ was the only explanation British Telecom gave for why Navigator wasn’t used and it did not elaborate. The browser has been improved to support key features on Web pages, the company said. Enhancements let it support tables, forms and backgrounds. British Telecom will charge a one-off registration fee of 20 British pounds for the software and a flat 15 pounds a month fee. There is an annual subscription available for 150 pounds, while an ISDN provision will be added later in the year.