Channel 5 has reported a rise in pre-tax profits of almost 50% as shows including Celebrity Big Brother and The X-Files helped it improve ratings against ITV and Channel 4. It is the first time that Channel 5 has reported back-to-back years of profitability in its 20-year history. Pre-tax profit soared to £58.9m, compared with GBP39.5m in the year to September 2015.