Roger has been overwhelmed by the reception they have received from Wales supporters in France, saying: "What a reception. "We were in the restaurant and I went to the window and all the Welsh fans were singing, they were chanting my name and I was in tears.
"They really are fantastic supporters, the best in the world." BBC broadcaster Caroline Barker, who filmed the footage, tweeted: "Roger Speed being mobbed by fans in Lyon.
Cardiff (Welsh: Caerdydd) is the capital of Wales in the United Kingdom.
It is now a lively and modern capital city, gaining popularity with tourists interested in its history and in Welsh culture and is quickly becoming one of the United Kingdom's tourism hot spots.
Summer is by far the best time to visit as the city hosts large festivals with al fresco dining and drinking becoming ever more popular due to large areas of pedestrianisation.
The city centre has seen huge development over the last decade and is now considered one of the top ten shopping destinations in the United Kingdom.
Cardiff is a very green city, having the most green space per person in the UK, and this is complemented by Bute Park which sits in the heart of the city.
This was the emotional moment the father of tragic Gary Speed was mobbed by Welsh fans in Lyon ahead of tonight's Euro 2016 semi-final against Portugal.
Roger Speed and his two grandsons, Ed and Tom, are in the French city to witness the most historic night in Welsh football history, nearly five years after the death of Gary in November, 2011.There were tears and emotion as Mr Speed and a group of Wales fans embraced as the supporters spontaneously chanted the name of the former Wales boss after spotting Roger.Gary Speed was, of course, the man who started this remarkable football journey, and he will always be remembered with great affection by Welsh football fans.It has a reputation as a city of castles, having 5 different castles within its surroundings.The city's core population stands at roughly 345,000, with 860,000 living in the larger urban area.Cardiff is on the south coast of the south Wales plain, with a shoreline on the Bristol Channel.