St Paul's Cathedral in London, England on November 2.
St Paul's Cathedral in London, England on November 2.
DANIEL SORABJI/AFP/AFP/Getty Images
Another view of St Paul's Cathedral on November 2.
Another view of St Paul's Cathedral on November 2.
DANIEL SORABJI/AFP/AFP/Getty Images
A couple take a "selfie" in front of the Houses of Parliament in central London on November 2, 2015.
A couple take a "selfie" in front of the Houses of Parliament in central London on November 2, 2015.
JUSTIN TALLIS/AFP/AFP/Getty Images
Police officers on horses ride past the Houses of Parliament in thick fog in central London on November 2.
Police officers on horses ride past the Houses of Parliament in thick fog in central London on November 2.
JUSTIN TALLIS/AFP/AFP/Getty Images
Fog shrouds the London Eye in central London on November 2.
Fog shrouds the London Eye in central London on November 2.
JUSTIN TALLIS/AFP/AFP/Getty Images
A man walks his dog walk through a park in Peckham, London on November 2.
A man walks his dog walk through a park in Peckham, London on November 2.
Dan Kitwood/Getty Images Europe/Getty Images
The Anglican Cathedral in Liverpool, England seems to disappear into the fog on November 2.
The Anglican Cathedral in Liverpool, England seems to disappear into the fog on November 2.
Ben Pruchnie/Getty Images Europe/Getty Images
Manchester United players practice at their training facility in Manchester, England on November 2.
Manchester United players practice at their training facility in Manchester, England on November 2.
Alex Livesey/Getty Images Europe/Getty Images
A swan glides through the fog next to a wier on the River Trent on November 1 in Newark Upon Trent, England.
A swan glides through the fog next to a wier on the River Trent on November 1 in Newark Upon Trent, England.
Dan Kitwood/Getty Images Europe/Getty Images
Fog hangs over Newark's 12th century castle that sits on the River Trent on November 1, in Newark Upon Trent, England.
Fog hangs over Newark's 12th century castle that sits on the River Trent on November 1, in Newark Upon Trent, England.
Dan Kitwood/Getty Images Europe/Getty Images
It's not just the UK that has been covered in fog this week. Here a tree is partially fog covered near Mintraching, southern Germany, on November 1.
It's not just the UK that has been covered in fog this week. Here a tree is partially fog covered near Mintraching, southern Germany, on November 1.
ARMIN WEIGEL/DPA/AFP/Getty Images
A view of Paris' Eiffel Tower on October 29.
A view of Paris' Eiffel Tower on October 29.
JOEL SAGET/AFP/AFP/Getty Images
An aerial view of the sun rising above early morning mist in the countryside near Abbiategrasso, southwest of Milan on October 24.
An aerial view of the sun rising above early morning mist in the countryside near Abbiategrasso, southwest of Milan on October 24.
OLIVIER MORIN/AFP/AFP/Getty Images
<a href="index.php?page=&url=https%3A%2F%2Finstagram.com%2Fp%2F9lX0yUzCXB%2F" target="_blank" target="_blank">Bethany Adams</a> was on a morning run when she stopped to take this picture of Big Ben hidden behind the fog on Monday.
Bethany Adams was on a morning run when she stopped to take this picture of Big Ben hidden behind the fog on Monday.
Bethany Adams/Instagram