Ms Elser told news.com.au: “Before we scratch this up to Kate getting bored shooting her kidlets against the bucolic backdrop of their country home, given what we know about the Cambridge tots’ two-wheeler habits, the unavoidable conclusion is that the duchess just might be sending her brother-in-law Prince Harry a barbed message here.
“See, last month when he and wife Meghan Duchess of Sussex sat down with TV titan Oprah Winfrey to pour their hearts out about why they turned their backs on royal life for a new shiny much, much wealthier existence in California, Harry shared this particularly interesting titbit.
“When Winfrey asked him what ‘delights’ him about his new life, he said: ‘I guess the highlight for me is sticking Archie on the back of a bicycle in his little baby seat and taking him on bike rides, which is something I was never able to do when I was young’.
“And that is why Kate’s decision to photograph her youngest son on a bike is so marked.”
Kate was mentioned in the Oprah interview, as Meghan alleged her sister-in-law made her cry in 2018, rather than the other way around as had been reported.
Meghan said: “I don’t say that to be disparaging to anyone because it was a really hard week of the wedding and she was upset about something.
“A few days before the wedding, Kate was upset about something. Yes, the issue was correct about flower girl dresses.”
Louis was last seen in a picture released in tribute to his great-grandfather last week.
The picture showed Philip and the Queen surrounded by their great-grandchildren at Balmoral and the Queen was holding Louis.
Kate also confessed in January that parenting during lockdown has left her “exhausted”.
She also joked about how Louis, George and Charlotte recoiled in “horror” when she became their hairdresser.
Louis has rarely been seen in public over the last year.
His most memorable outing being pictured with his parents and older siblings at a special pantomime performance at London’s Palladium Theatre last winter.