"Bowls is quite easy for older people but any sport, walking, football, rugby, you name it, get out there, exercise, play games.

"Competing is brilliant whatever age you are," Miller said.

The Scottish team, which featured Miller as lead director, Melanie Inniss as lead, Robert Barr as skip and Sarah Jane Ewing as skip director, had to fight back after a sound start by Wales.

But once Scotland drew level at 4-4 in the sixth end, they were never behind and gradually extended their advantage.

They held on for a 16-9 victory despite a Welsh fightback.

England won bronze after a 14-11 win against Australia.

At 75, Miller and Llewellyn both eclipsed 72-year-old Rosemary Lenton, who won gold for Scotland in the women’s Para bowling pairs earlier in the week, as the oldest gold medallist at any Commonwealth Games.

Elsewhere at Leamington Spa, England won gold in the women’s triples after beating Malaysia 17-9.

Jamie Lea Winch, Natalie Chestney and Sian Honnor were always in control against the Malaysia trio of Nur Ain Nabilah Tarmizi, Syafiqa Haldar Afif Abdul Rahman and Azlina Arshad.

England trailed for only one end in the entire match.

They restored their advantage in the 13th end and were never again in trouble.

"That game was a hard slog, the bowls were pinging all over the place and I kept catching edges, it was close but no cigar far too often," Honnor said.

"Winning this gold means pretty much everything, all the hours of work and sacrifice, it is for moments like this."

New Zealand beat Cook Islands 27-6 to win bronze.