Lena was seen drinking from a red sippy cup as the family enjoyed the equestrian event.
Later on Zara was seen taking her eldest daughter Mia for an ice cream.
Mia enjoyed the mint choc chop variety topped with a chocolate flake which Zara also tasted.
Husband Mark recently opened up about how Mia is adapting to becoming a big sister.
“[Mia] is very happy to be a big sister, she is happy about that," he said, adding that thoughtful friends and family were helping with the transition," he told Hello!
“We are lucky that people that have sent Lena a present have also thought about Mia, so she is getting stuff to open as well.”