Canine customers have been snapped enjoying a ride on the newly-launched Elizabeth Line.
London’s long-awaited newest Tube line has finally opened to passengers - four years late and £3bn over budget.
And some were even accompanied by their pets, with a series of adorable photos marking the occasion.
At just after 7am, Chris Lovitt, a deputy public health director from Tower Hamlets, shared a snap of his pooch Reggie.
The rescue spaniel from Bosnia, now “living his best life” in London, was pictured by the entrance to the station, along with his proud owner.
Chris tweeted: “And the very first dog on an Elizabeth line- Reggie of course!”
The new line was officially opened by the Queen, along with Prince Edward, prime minister Boris Johnson, transport secretary Grant Shapps and London mayor Sadiq Khan, last week.
Railway fan Craig Rowley took his dog Pepper for an early morning trip decked out in a commemorative purple collar.
Their early wake-up at 4.30am succeeded in making the well-dressed mutt one of the first pup passengers on the new line.
“Pepper taking her spot in history,” he said.
Transport writer Pete Nilsen shared a snap of a fellow passenger’s pet, commenting: “This may well be the first dog on the Elizabeth line @TfL.”
Mayor Sadiq Khan, who also boarded the first 6.30am Elizabeth Line service, joked: “All aboard the first train from Abbey Woof!
“Strong canine showing for today’s Elizabeth line launch.”
And he shared a series of photos of three very well-behaved pets.
While TfL staff also posted and retweeted photos of dogs on the underground to their social media feeds.
Transport for London (TfL) rules allow passengers to bring dogs - and other well-behaved animals on the underground, as long as they are kept on leashes or in crates.