Firefighters called to the scene of an apparent fire at Blackpool Tower said they actually saw an orange grate.
Witnesses spotted “flames” coming from a piece of metal near the top of the famous landmark at around 14:15 GMT.
Lancashire Fire and Rescue Service (LFRS) deployed six fire engines and a “rope rescue” team to the scene.
Staff were evacuated from the 129-year-old tower but LFRS said a team of experts had accessed the area and confirmed there was no fire.
A statement posted on X, formerly Twitter, read: “Lancashire Fire and Rescue Service were called to the Promenade, Blackpool today by the concerned public, due to a combination of factors causing them believe it was a fire.
“The area where the fire is suspected to have occurred is generally inaccessible, so accessing this area is very difficult.
“A specialist team from Lancashire Fire and Rescue Service attended and confirmed there was no fire.
“This incident was supported by the National Aviation Police Agency, who used thermal imaging to provide further assurance.”
LFRS initially said it had six fire engines, a drone team and a “rope rescue” team involved in tackling the fire on the Promenade.
Lancashire Police said the top of the tower is currently closed for renovations and is difficult to access.
“Our helicopter flew over the tower and there was no fire,” it said.
The force confirmed what was visible was “orange netting”.
The force said a man was arrested on suspicion of breach of order near the scene.
A spokesman for Blackpool Tower said: “We can confirm that the fire brigade… have confirmed that there is no fire.
“Our well-rehearsed emergency procedures were in place and we can confirm that what looked like a fire from afar was in fact lighting on the reflective mesh surface at the top of the tower. “
Built between 1891 and 1894, the tower is 519ft (158m) high and is a Grade I listed building.
Inspired by a trip to Paris in 1889, former Blackpool mayor Sir John Bickerstaffe came up with the idea of building a Lancashire version of the Eiffel Tower.
- The total cost of its design and construction is £290,000 (equivalent to around £30 million by 2023).
- Sir John Bickerstaffe even spent £2,000 (equivalent to about £210,000 today).
- The tower’s architects were Maxwell and Tuke of Manchester, who both died before completion
- There are more than five million bricks in the tower
- The structure contains 2,493 tons of steel and 93 tons of cast iron
- More than 3,000 people visited the tower on its opening day – May 14, 1894
- From the top of the tower you can see the Lake District, Isle of Man and North Wales on a clear day
- The original ballroom opened in August 1894 – the current version – seen on BBC’s Strictly Come Dancing – was designed by Frank Matcham and opened in 1899