For five years, engaged couple Cat and John pondered over what their perfect wedding day would look like.

"We wanted our wedding to do good," primary school teacher Cat Howson-Harper says thinking back to those early discussions. "We wanted it to change the world in some way."

The year of their engagement was also the first year Cat volunteered with a charity called the Newman Holiday Trust, which provides holidays for over 120 children between the ages of four and 16 who have disabilities or special needs.

Spending a few days away from their families, the children all receive one-to-one care with Cat volunteering at the Glenalmond camp.

But through her profession and volunteering roles, she would often hear stories of children with additional support needs who would miss out on family weddings due to worries over how they would cope with the formalities or stresses of the day.

She wanted to change this and began to feel like their wedding day was the perfect chance to do so.

"I just felt so sad about it because I have some wonderful memories of going to weddings as a kid," she says. "They are happy and joyous.

"So we set about creating a day that was about us getting married as well as the children on the camp getting the chance to come to a wedding."

With the support of the charity the couple spent some time planning a wedding that would be child-friendly as well as fun, and a date of July 22 was set to transform the holiday centre into a wedding venue on the last day of camp.

They watched with delight as the kids embraced the big day by decorating cupcakes, making bunting and adding ribbons and bows to the outdoor area next to their dorm where they would wed.

The couple also added some personal touches with John wearing a rubber duck tie and the bridesmaids wearing the same themed dresses in a nod to John's first anniversary gift to Cat, a tradition they have carried on every year.

For bride-to-be Cat, she opted for a more traditional look, joking that she did have to politely decline some of the suggestions from the children.

"One or two people suggested that my husband should come as Dr Who because I love Dr Who.

"But when they saw the rubber duck theme, all the kids really enjoyed that.

"I had the proper white dress princess look. We debated many options but in the end, we decided I wanted to look like a bride for it to make sense."

Joined by a small group of family and friends as well as the 24 children and 28 helpers at the camp, Cat says the wedding party was in high spirits during the ceremony.

"Each child had a little bag of bits and bobs and, during the service, we asked the registrar to give them clues of what to use," she says.

"During the hand fasting when we were tying the ribbons around our hands, they all had ribbons to wave as well as bells to ring and bubbles to blow at different points.

"As a bride, I imagined you would look at your groom as you walk towards him and I had him there, but I also had all the children going 'she's a princess'.

"It was just so amazing to get that kind of reaction. We were worried that some of the kids wouldn't enjoy the ceremony but would enjoy some of the fun things after but they all sat glued watching what was going on and what they had to do next.

"It was full of laughter and giggles and bright colours - it was wonderful."

The party continued with a wedding breakfast in the dorm dining room followed by a disco, with the happy couple say they were touched by how the children reacted as one boy showed off some magic tricks he had been practicing for their wedding day.

"There was also one girl who every time she walked anywhere near me just wanted to hug me because she loved the fabric of my dress," Cat says.

"So once my dress comes back and it is all clean, I am going to cut a little square out for her and post it to her so she has got a little square of fabric to keep."

As well as creating a first wedding experience for some of the children during theirs week's holiday, the couple also raised £1500 for the charity instead of receiving wedding gifts.

Cat is already booked up to help out again in 2017 and is looking forward to returning to a place which now holds an extra special memory for her.

"The camp does two things," she says.

"It is a chance for the children to make new friends and do something they might not normally do and be away from mum and dad.

"And it gives mum and dad a bit of respite which I think can be quite important.

"Those two things together, it is just wonderful."