ZOEY Clark and Eilidh Doyle helped lead Great Britain to a silver medal on a day of mixed fortunes in the World Championships.

Along with Laviai Nielsen and Emily Diamond, the two Scots picked up a silver medal in the 4x400m relay, coming behind favourites America but holding off a strong challenge from Poland.

It meant Great Britain finished in two minutes 56.60 seconds as the hosts claimed their fifth medal of the championships.

The team had qualified second fastest, with Clark the only Scot in the heats – Doyle replaced Perri Shakes-Drayton for the final.

Meanwhile, Scot Laura Muir declared she was satisfied with her World Championships as she prepares to return to her studies.

The 24-year-old finished sixth in the 5000 metres yesterday after finishing fourth in the 1500m last week.

Muir had played down her chances in the 5000m, a relatively new event for her, and she never challenged for a medal to finish in 14 minutes 52.07 seconds.

“I’m really happy, sixth in the world in an event I’ve only run once before outdoors, I’m really pleased,” she said after Kenya’s Hellen Obiri ran away with the race.

“I was going to let [Almaz] Ayana and Obiri go, I knew they were in a different class of their own right now, I wasn’t too worried about them breaking away.

“I had a lot of rounds in the legs so I had to pace myself and stay strong. Fourth and sixth, five races in 10 days, I think I can take so many positives from this.

“I’ve showed I’m a contender in both events so I’m happy with that. To get that fourth was really hard but at the same time I know I have the potential to get a medal. It’s better to be that close than really far away.”

It completed her championships and she will now head back to Scotland and return to her studies to become a vet in a week.

Muir added: “It’s a solid eight months rotation. I’m looking forward to getting there and hopefully graduating next year as a vet.”

Also in that race was Eilish McColgan, finishing a respectable 10th place.

“It was totally different to what I expected it to be,” McColgan admitted, after coming within five hundredths of a second of the personal best 15:00.38 she had set in the semi-final.

“I thought it would be fast from the start and we’d all be hanging on, but we were practically walking those first couple of laps. It’s a shock to the system when you go from walking then in to a fast pace, and I think that’s definitely something I need to get used to doing.”

Lynsey Sharp finished last in the 800m final in 1min 58.98secs, having reached it as a fastest loser on Friday.

Sharp tried hard to get involved, but even before she had to win her case for reinstatement to the final after initially being disqualified for barging during the semi-final, she had only just squeezed into the last available fastest loser slot and duly finished at the back of the field with a time of 1:58.98.

Hopes had been higher of Chris O’Hare in the 1500 metres, but after challenging in the early stages he, too, found the pace too much for him, as he finished last in 3:38.28 more than four seconds behind Kenyan winner Elijah Manangoi, who edged out compatriot Timothy Cheruiyot.

Great Britain also claimed bronze in the men’s 4x400 metres relay to add to the women’s silver medal, making it four out of four for relay events.

The squad, Matthew Hudson-Smith, Martyn Rooney, Rabah Yousif and Dwayne Cowan, clocked a season’s best of two minutes 59 seconds behind winners Trinidad and Tobago and second-placed United States.