A royal watcher from north Wales hopes to present the Queen with a poem he has written to mark her 80th birthday.
Colin Edwards has been a fan of the monarchy since he was 12
Colin Edwards, 65, from Ruthin, has met the Queen more than 100 times in the past 25 years.
His devotion to Her Majesty has not dimmed over the years. He said: "I get as much pleasure and excitement now as I ever did.
"Everyone has a hobby. Some men are football fanatics, this is what I do. I enjoy it, and that's all that matters."
The retired local government worker joined the throng on Windsor's Castle Hill to wish Her Majesty happy birthday.
He claimed the Queen now recognises him among well-wishers at public events because he wears a union jack cap.
Speaking before travelling to London, he said: "There will be lot of people there from all over the country that I know, and have met many times in the past, and we're all ardent royalists.
"The Queen actually knows us all, not all of us by name, but she knows us all as soon as she sees us. She's very good, she never lets us down."
He hopes to be able to hand her a copy of his four-verse ode marking her 80th birthday.
QUEEN'S MAJOR VISITS TO WALES
Claewen Dam, Powys, 1952
Opens Severn Bridge, 1966
Lays wreath at Aberfan, 1966
Prince Charles' investiture, Caernarfon Castle, 1969
Opens Welsh assembly, 1999
Opens WMC, 2004
Opens Senedd building 2006
His home is filled with royalty memorabilia, as well as thousands of photographs he has taken of her and the Queen Mother.
If he meets the Queen again on Friday, it will be their 114th meeting.
He said: "If I'm at the front of the barrier with my friends as I usually am, having arrived early for a grandstand view, obviously I'm hoping to have a one-to-one meeting with her.
"It's a great honour and privilege to meet the Queen, and be present at these events. I feel I am a participant in history."
An 80th Birthday Tribute to Her Majesty
by Colin Edwards
Eighty years ago today
You were born a Princess
And twenty five years later
Became our gracious Queen
Throughout your life
In good times and bad
You have been an inspiration
To the people of our nation
I end this tribute Ma'am
With a heartfelt prayer
May God bless you and keep you
In His loving care
With my warm affection
And loyal greetings on
This historic occasion