When the Duke and Duchess of Sussex kick off first Commonwealth tour as a married couple, they will of course follow a careful-curated schedule taking in each of their personal interests.

As they do so, there will be one particular interest never far from their minds: Granny.

The Duke and Duchess, who arrived in a wet and wintery Australia on Monday, are to follow in the footsteps of the Queen and the Duke of Edinburgh throughout their tour, undertaking at least one event which exactly mirrors their visit 65 years ago.

The Duke will speak on stage at the Royal Opera House in Sydney, 45 years after his grandmother officially opened it on October 20, 1973.

In Australia and New Zealand, the couple will unveil the latest Queen’s Commonwealth Canopies, preserving native bush and the water-hardy Satinay trees, of the type used to build the London docks in the 1930s, in Her Majesty’s “legacy project”.