A Fitch Ratings statement said its placement of the UK on a negative watch indicated a "heightened probability of a downgrade in the near term."
The RWN reflect the latest economic and fiscal forecasts published by the Office for Budget Responsibility (OBR) that indicate that UK government debt will peak later and at a higher level than previously expected by Fitch.
More top news
German Chancellor Angela Merkel has called on fellow European nations to share the burden of the influx of migrants.
Satellite images have revealed the extent of the damage to the ancient Temple of Bel in Syria's Palmyra city by Islamic State jihadists.
Nearly half of all young people are bullied at school each day with many left feeling suicidal due to the experience, according to a survey