The Queen's car sparked a false alarm that the Duke and Duchess of Sussex's baby had been born today as it was filmed arriving at Windsor Castle.
Motorist Tamoor Ali, 37, spotted the Bentley vehicle with pink blankets in the window escorted by a police motorcade through the Berkshire town today.
But it later emerged that the car was carrying the Queen to present a service of the Royal Victorian Order at St George's Chapel in front of 1,200 people today.
Mr Ali, a finance worker from Slough, told the Sun Online: 'We had got off the M4 and a police motorbike stopped us and asked us to pull to the left.
'Then we saw a vehicle that had pink paraphernalia at the back of the windscreen go past - it was going very slowly over speed bumps.
'It seemed like someone was in there who couldn't handle speedbumps - a baby. It seems to me that the baby is here and they haven't announced it yet.'
It came as bookmakers suspended bets on Meghan already having given birth to her first child after a flurry of bets suggested 'someone knows something'.
Paddy Power claimed that the bets, placed on the Duchess of Sussex having given birth during the night, suggested that someone was in the know.
And the money placed on the possibility of the baby's birth having happened led to the suspension of further bets.
Bookmakers have suspended bets on Meghan Markle (pictured on 11 March with Prince Harry) already having given birth to her first child after a flurry of bets suggested 'someone knows something'
The Duchess of Sussex previously told well-wishers that her due date was the end of April or early May, but she has not been seen in public for nearly 50 days - when she and Prince Harry visited New Zealand House on March 19 (above)
The Duchess of Sussex previously told well-wishers that her due date was the end of April or early May, but she has not been seen in public for nearly 50 days - when she and Prince Harry visited New Zealand House on March 19.
A Paddy Power spokesman said: 'We've suspended betting on which day Harry and Meghan's baby will arrive following a huge increase in wagers this evening which indicate to us that someone knows something – and perhaps the child is already born.'
'That, combined with the rumours and speculation has us convinced that the royal arrival has already happened and if the betting is anything to go by, it's almost certainly a baby girl.'
Before the suspension, bets had poured in on the possibility of Prince Harry and Meghan having a boy.
Odds were down from 11/10 on Wednesday to evens yesterday, but a girl was still the favourite at 8/11.
The favourite for the name with Ladbrokes is Diana at 4/1, followed by Grace at 8/1 and Arthur and Alice at 12/1.
Further behind were Victoria at 14/1, James at 16/1 and Elizabeth and Alexandra at 16/1.
Speculation went into overdrive on Wednesday after Prince Harry announced a trip to the Netherlands next week, meaning he could potentially miss the birth of his first child.
This convinced royal fans that the baby was already here but sources are now 'categorically' denying the speculation.
Fans on Instagram were also teased after Harry and Meghan posted a late night Instagram post on Wednesday which turned out to be about mental health.
A Paddy Power spokesman said they suspended betting on Meghan having already given birth after a 'huge increase' in wagers yesterday evening indicated that 'someone knows something – and perhaps the child is already born'
Prince Harry will be in the Netherlands on May 8 and 9, despite the birth of his first child being imminent.
Meghan is due any day now and the trip could mean that Harry is either away for the birth or for the first few days of being a first-time father.
The trip, combined with radio presenter Chris Evans sensationally claiming live on air that the Duke and Duchess of Sussex have already had their baby, left fans abuzz with excitement.
However, palace sources immediately dampened the rumours.
The Prince has been seen in a number of public engagements in the past week, including Saturday's London Marathon and an appearance at the Anzac Day Service with his sister-in-Law Kate, the Duchess of Cambridge.