"It's not just a US problem. The UK has a huge dog in this fight," he said. "They (GCHQ) are worse than the US."
The information is the latest leak from Mr Snowden, who has been responsible for a string of disclosures about US intelligence operations.
More top news
The mother of Reeva Steenkamp, the model shot dead by Oscar Pistorius, has written about how she felt during the trial.
Customers could be losing out due to credit card companies not providing enough information, consumer group Which? has found.
Spurs say they are supporting troubled former star Paul Gascoigne after it was reported he had been placed on an emergency three-day detox.