And it was a memorable weekend for the former Eyemouth High School student. Although she didn't win the overall title, she was handed the accolade for Most Improved Model.
Not bad at all, considering there were 29 girls vying for honours and only a handful went away with an award.
Lynn-Marie, of Tweedmouth, travelled down to the final in London with no expectations and was intent on just enjoying the whole experience, so to be singled out by the judges left her pretty gobsmacked.
"I couldn't believe it when I was told I'd won Most Improved Model," the 22 year-old said.
"There were 29 models competing on the day and most of the girls went away empty handed so it was a really good thing to win.
"Show director Geoff Cox said he had been really impressed with the progress I'd made since my original audition, considering I'd had absolutely no previous experience as a model.
"My award was given by Impact Model Management which makes it all the more special and they've said that they are keen to keep in touch with me."
With a top modelling contract, fashion photo shoots and a holiday to Milan up for grabs for the eventual winner, the judging panel watched every move the contestants made, meaning there was little room for mistakes.
"There was so much attention to detail it was unreal," Lynn-Marie continued.
"We were being watched the whole time, for example, if a girl blinked or pulled a funny face on the catwalk she was told to go back and do it again. Luckily when I did my walks Geoff said I nailed them every time."
For someone who normally works in a 9-5 job, the whole experience of taking part in such a glamorous event at a top location, like the London Hilton Metropole, is something Lynn-Marie said she would never forget.
And she said she was determined to enjoy every second.
"My boyfriend David, my mum and her friend came down to London with me," Lynn-Marie continued.
"I wanted to have a weekend to remember although things didn't get off to the best start when someone tried to steal my seat on the train!
"We stayed at the Metropole itself and everything about it was fantastic - the room, the pool the fact that the staff made us feel like celebrities - it was amazing!
"And then the day before the final David and I got to have a good look around London, including Wembley Stadium and then on the night it was the VIP Party to which all the finalists were invited."
As well as giving her the opportunity to showcase her own potential and network with model industry bigwigs, the pre-final schmooze also allowed Lynn-Marie to promote one of the businesses that had been supporting her from the start.
She continued: "For the party I wore a blue dress from Bella B, Berwick, who have been a massive help. I can't thank them enough and it was great to be able to promote them a bit.
"I got a lot of compliments on the dress and how I wore it and it was great to get that positive feedback."
Geoff Cox said that the standard of entrants in Top Model UK 2010 was the highest he'd seen for the competition and Lynn-Marie said she tried not to be overawed by the occasion and was happy with the performance she put in in the final catwalk.
"The room was absolutely packed full but I just went out there and focussed on what I had to do. For those moments nothing else mattered and all I wanted to do was nail my walks.
"I loved all of my outfits, especially my burlesque look when I wore a corset and gloves and had some amazing shoes.
"And it was also fantastic to get some great comments about the jacket we'd been told to customise as part of the competition. One of the designers said they'd noticed mine hanging on a rack and were immediately drawn to it.
"My mum helped me a lot with it so it made me feel really proud to go down the catwalk with it on in front of so many people."
Winning the title of Most Improved Model has given Lynn-Marie plenty of food for thought and she admitted herself that'd she'd be a fool to let her Top Model UK experience go to waste.
"I have a couple of ideas of what I'd like to do - I want to achieve something amazing. Doing so well made all the running round worth it.
I'm hoping Impact will give me a good reference if they can't take me themselves.
Well for the moment it looks like Lynn-Marie has definitely got her foot in the modelling door so keep your eyes firmly on the catwalk.