Calendargirl
Nit picking, but royal walkabouts took place before Diana, the late Queen did them for her Silver Jubilee tours in 1977.
Diana introduced a much more natural, easy going relationship with the public though.
King George V and Queen Mary are in fact credited with the first royal walkabout.
In June 1912, George V and Queen Mary visited south Wales and met coal miners at work in the pits of the Rhondda Valley. The Queen had a cup of tea in a miner’s cottage. They met working people and did so informally, not in ‘tall hats and black coats’, but in ‘ordinary country clothes’. The visit was an astonishing success and the template for a new kind of royal tour.