Stuart Campbell has gone missing in the Ben Loyal area

Police in the Highlands have issued a new photograph of a man who has gone missing.

The picture shows Stuart Campbell wearing the hooded, grey Berghaus waterproof he may have been wearing.

The jacket has a red zip and lining.

Officers said the 33-year-old from Dornoch may have gone hillwalking. His car, a red Suzuki Swift, registration number SY08 0FA, was found at a car park regularly used by walkers setting off for the ascent of Ben Loyal in Sutherland.

Extensive searches by Assynt Mountain Rescue Team and the RAF Mountain Rescue Service have failed to find the missing man. Search and Rescue Dogs Association members and a Coastguard helicopter have also been involved in the operation to try to find Mr Campbell.

Police Scotland said he is believed to have travelled to the area on Saturday 25 July with the intention of going hillwalking, but it is not known what route he planned to take.

Officers urged any walkers in the area to remain vigilant said they remain keen to speak to anyone who was in the area during the weekend of 25-26 July in case they may have seen anything which could be of use.

Inspector Kevin Macleod said: “It is extremely concerning for Stuart to have been out of contact with family and friends for this long.

“It is very important that any walkers who were on Ben Loyal or in the surrounding area last weekend to think back and let us know if they may have seen Stuart. Even if your information seems small or insignificant it may be helpful to our search.

“I would also urge workers in the area this weekend to remain vigilant and report anything which could be of note.”

Mr Campbell is described as 5ft 6in (1.68m) tall and of slim build with brown hair. He is likely to have been carrying a black The North Face-branded rucksack.

Anyone with information about Mr Campbell’s whereabouts can contact Police Scotland on 101, quoting incident 2773 of 27 July.

Paul Cairney is a keen walker and camper

Police are also asking for sightings of a Bannockburn man who is missing and who may be camping in the Highlands and Islands.

Paul Cairney, 59, was last seen outside his home on Wednesday 15 July. He has now been reported missing and there are increasing concerns for him.

He is described as 5ft 7ins (1.7m), with short greying hair and wearing glasses. It is not known what Mr Cairney is currently wearing but it is likely to be outdoor clothing and he may have a rucksack and camping gear, including a tent.

PC Graeme Boyle said: “Paul is a keen walker and camper and may have travelled some distance, including across the Highlands and Islands, to pursue his hobby of visiting and photographing bothies.

“If anyone has seen Paul we urge them to get in touch with us. Likewise, if Paul sees this appeal we ask him to contact us to let officers know that he is safe and well.

“If you have information that could help find Paul please contact Police Scotland on 101, quoting incident 1980 of Thursday, 30 July.”