As they stood briskly thrashing flags to and fro, there was a very serious matter to be settled: what does one say to the reigning Head of State of the UK while outside a tunnel?
For little Brook, the answer was easy: invite her home.
"It would be really nice for the Queen to come to Howden. I'd like her to come again. I've only seen on her television."
Sadly for Brook, the Queen was not touring the crowds on the North side of the tunnel.
She arrived in a cavalcade and spoke to dignitaries and business people about how, 45 years after opening the first tunnel, she was back to open the second.
The problem for Mike Linkleter, who was involved in building the vast structure, was that he did not expect Her Majesty to quiz him on technical points.
"She was asking about the engineering techniques. It shocked me a little bit. I wasn't expecting engineering questions."
The visit was brief, but the Queen made a speech and unveiled a plaque.
Her Majesty said: "I know the first tunnel has made a huge difference to people's lives on Tyneside, opening up access to so many communities once divided by this great river."
"Everyone who has contributed to this great achievement of immense benefit to the North East region, you can all be proud."
See the full report on the South Tyneside part of The Queen's visit here: