Diamond Geezers (ITV, 9pm)

FANCY a bit of bling that isn’t linked to gold, silver or bronze in Glasgow? Those who can afford to splash out on the real deal, usually head to London’s Hatton Garden. The area has been the centre the jewellery trade since medieval times, when it took its name from Elizabeth I's Lord Chancellor, Sir Christopher Hatton. It now houses numerous businesses, from skilled jewellery-makers to millionaire wheeler-dealers and multi-national companies.

One of the biggest characters is Michael Lynton, who has been creating bespoke pieces for more than 40 years. He began as an apprentice and has since worked for some of the biggest names in his business – yet still uses techniques that have barely changed in centuries.

Here he's seen working on a recent commission involving a gold bird decorated with diamonds that will form part of a necklace: "These tools are like my children, I just know them, I've been working with these things for so many years," he says. "You've got to love what you do and I've always stuck to the maxim, if you don't like what you do then you're not really going to be very good at it. I'm still only as good as the last job that I've done."

Leigh Stutman, a glamorous 25-year-old, is one of only a handful of women working in precious metal reclamation. Her company extracts gold from dirty workshops, sifts through drains for discarded precious metals and even melts down gold teeth sourced by dentists.

"Anywhere that you could normally throw away waste in your workshop there will be metal in it: you clothes, seat covers, shoes. We've even had people give us their dog beds," says Leigh.

There are folk on the other side of the counter too, and here we meet security guard Chris Eracleous who has chosen Karl Karter to make the diamond ring he plans to give to his girlfriend when he proposes. Let’s hope they get it right, or it’s a Hatton coat job.

Commonwealth Games (BBC1, 7pm)

HIGHLIGHTS include Mishal Husain and Jason Mohammad introducing diving, swimming, track cycling, badminton, hockey, judo and squash action. Then there’s the conclusion of the men's and women's triathlons. Gary Lineker is in the studio to present coverage of the first swimming finals from the Tollcross International Swimming Centre, which next year will host the sport's world championships. Medals in the men's 400m freestyle and women's 4x100m relay are among the races to look out for, with Michael Jamieson going for gold in the men's 200m breaststroke.

Amazing Spaces – Shed of the Year (Channel 4, 8pm)

NO sooner does George Clarke finish his latest run of Amazing Spaces than the Wearsider is back with a spin-off, which is less about storing garden equipment, and more about housing a multitude of items in this three-part series. Among the delights are a building owned by a Dad's Army fan and a place that's been transformed into a 1970s amusement arcade. Clarke, Will Hardie, Max McMurdo and Laura Jane Clarke start with a trip to a cinema shed and a 21ft-wide replica of a tea pot.