Kate Moss looks fresh as she leaves hotel with boyfriend Count Nikolai von Bismarck

Kate Moss, 42, looks fresh-faced as she leaves hotel with boyfriend Count Nikolai von Bismarck, 28, after partying the night away together at her clothing launch

Published: 10:58 EST, 2 June 2016 | Updated: 13:44 EST, 2 June 2016

They spent the night celebrating the launch of her new collaboration, Kate Moss For Equipment x Net-a-Porter, at the Chiltern Firehouse on Wednesday evening.

And Kate Moss and boyfriend Count Nikolai von Bismarck looked to have even treated themselves to an overnight stay at the designer hotel as they were seen emerging from the Neo-Gothic ex-firehouse on Thursday morning.

Despite spending the entirety of the evening partying in style with her celebrity pals, Kate and her man looked decidedly fresh-faced as they headed home the following day.

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Fashionable exit: They spent the night celebrating the launch of her new clothing collection at the Chiltern Firehouse on Wednesday evening and Kate Moss and boyfriend Count Nikolai von Bismarck even treated themselves to an overnight stay at the designer hotel as they departed the venue on Thursday morning

The supermodel looked stylish as ever as she left the hot spot in a fashion-forward monochromatic ensemble, her staple colour scheme.

Descending from a hotel step, Kate rocked a black vest top, which she layered with clashing prints in the form of an animal print shirt and scarf emblazoned with a star motif.

She slipped her lithe legs into black skinny jeans and ditched the stilettos she rocked the previous evening for ankle boots adorned with metal button detailing.

Gorgeous: Despite spending the entirety of the evening partying in style with her celebrity pals, Kate and her man looked decidedly fresh-faced as they headed home the following day

If it's not broken! Nikolai was sporting the same ensemble he donned the previous evening, though opted for a change of shirt as she was pictured hauling his suitcase out of the venue following their stay

Fashionista: The supermodel looked stylish as ever as she left the hot spot in a fashion-forward monochromatic ensemble, her staple colour scheme

Rock chick: Descending from a hotel step, Kate rocked a black vest top, which she layered with clashing prints in the form of an animal print shirt and scarf emblazoned with a star motif

Perhaps still feeling a little sleepy-eyed, Kate concealed her eyes beneath black shades as she walked alongside her 28-year-old beau.

Nikolai was sporting the same ensemble he donned the previous evening, though opted for a change of shirt as she was pictured hauling his suitcase out of the venue following their stay.

It was a big night for Kate who was attending the hotspot to launch her Kate Moss For Equipment x Net-a-Porter collection.

Leading lady: Nikolai followed closely behind his girlfriend as they left the hotel

Trendy as ever: She slipped her lithe legs into black skinny jeans and ditched the stilettos she rocked the previous evening for ankle boots adorned with metal button detailing

Brr! Nikolai was seemingly feeling a little chilly as he wrapped up in a sizeable coat

Back on: Kate and her toyboy lover Count Nikolai, 28, appeared to have resolved their issues as they headed to the Chiltern Firehouse on Wednesday

Arriving at the nightspot, Nikolai led the way in a dark trench coat, a navy polo shirt with matching trousers and brown suede shoes, while Kate gripped her man's arm.

The model cut a sophisticated figure in a black suit with an unmissable red shirt visible through her open jacket, buttoned up to the collar, at least at the start of the evening.

She then slipped her hand into Nikolai's, and the pair looked comfortable in each other's company as they strolled side by side.

Kate's golden tresses fell freely over her shoulders from a middle-parting and her famous cheekbones were accentuated with some subtle contouring.

Packing on the PDA: The couple posed for their most loved-up picture to date at the event with Kate resting her head against Nikolai's shoulder

Good party? Hours later, Kate left the venue looking pleasingly dishevelled, her sleek red shirt unbuttoned to reveal a hint of her chest

Messy hair, don't care: The supermodel - known for her love of a good party - didn't seem to care about the state of her chaotic mane in the small hours

Stand by your man: But earlier in the evening, Nikolai led the way in a dark trench coat, a navy polo shirt with matching trousers and brown suede shoes, while Kate gripped her man's arm

Typically stylish: The model cut a sophisticated figure in a black suit with an unmissable red shirt visible through her open jacket

Her big night: Kate's golden tresses fell freely over her shoulders from a middle-parting and her famous cheekbones were accentuated with some subtle contouring

Made-up: Her peepers were decorated with plenty of smoky eyeshadow and lashings of mascara ensuring she looked stunning for their outing

Her peepers were decorated with plenty of smoky eyeshadow and lashings of mascara ensuring she looked stunning for their outing.

Plenty of Kate's pals turned out to support her collection launch. Meg Mathews, Nick Grimshaw, Lara Stone and Anais Gallagher were all in attendance.

Dutch-Anglo model Lara Stone looked smitten with hunky Australian model Jordan Barrett, 19, with the pair giggling away on a sofa.

Back on track: The pair looked loved up once again as they headed out together

Style queen: Kate proved she's still got what it takes to stand out from the crowd

Onwards and upwards: Earlier last month it was reported that Kate had kicked Nikolai out of her home and ordered him to rehab

Hand in hand: She then slipped her hand into Nikolai's, and the pair looked comfortable in each other's company as they strolled side by side

Backs to the wall: Kate showed off her modelling credentials as she posed in front of an exposed brick wall

Windswept: Kate's golden locks blew across her face in the gentle night time breeze

A helping hand: A male aide helped to guide Kate towards the venue with a gentle hand on the back

Eyes wide shut: As she temporarily closed her eyes her lengthy lashes were there for all to see

The pair have been spending plenty of time together as of late and certainly were happy to put on a close display in front of the cameras.

The pair started dating after Kate split from her musician husband Jamie Hince, 47, last July, and since then they have been seen enjoying a holiday together in Brazil.

Fresh-faced: Kate's complexion looked flawless even after spending the evening busy mingling

He's gone: Kate was seen with her shirt unbuttoned and a star-printed black skinny scarf tied around her neck as she left the party, holding hands with a member of her entourage, Nikoali not present

Once a party girl, always a party girl: Kate cut a typically bemused figure on her exit from the soiree, but still glowed with natural beauty

Preened: Although she cut a sleepy figure, not one bit of Kate's flawless make-up had smuged

Starry night: The supermodel added a black necktie to her ensemble adorned with white stars

Pretty as a picture: Kate's classy application of make-up ensured she was at her beautiful best

Fashion icon: Kate proved she's still at the top of her game, putting on a head-turning display for the evening

Lady in red: Kate certainly made a statement with her choice of shirt

Earlier last month it was reported that Kate had kicked Nikolai out of her home and ordered him to rehab.

The supermodel had allegedly had enough of his debauched ways and sent him packing from her country home after 'erratic' behaviour during a week away in the Cotswolds.

The final straw came when the blood-drinking Count Nikolai was said to be hallucinating on the trip and jumped out of a window to chase an imaginary intruder, reported The Sun.

Sitting comfortably: Noel Gallagher's daughter Anais, 16, placed an affectionate hand on Kate's shoulder as the pair took a seat

Supportive: Kate's old pal Meg Mathews turned out to support her friend in a burgundy varsity jacket and torn jeans

Famous friends: Radio One DJ Nick Grimshaw showed off his peroxide locks

Hanging out: Grimmy placed an arm around pal Aime Phillips who wore trendy thigh-skimming dress

Walking tall: Lara Stone's lithe limbs were accentuated in a pair of skin tight three-quarter length trousers

Blossoming romance? Lara Stone, 32, appeared smitten with Jordan Barrett, 19, at the collection launch

Having a blast: Lara couldn't have sat closer to Jordan if she'd tried as they hung out with Meg Mathews on a sofa

Model material: She teamed the garment with a pair of three-quarter length black trousers which highlighted her lithe limbs

Getting on famously: Meg and Jordan seemed to hit it off at the event and posed for a cool picture

Ample assets: Lara put on a very busty display with her buttoned down shirt showing plenty of cleavage

Strike a pose: DJ Fat Tony and David Graham flanked Kate with the trio showing off their pouts

A family affair: Kate younger sister Lottie, 18, cast an eye over the collection

Friends in high places: NET-A-PORTER president Alison Loehnis and Kate put on a very close display

Gal pals: Lucy Yeomans and Charlotte Tilbury were all smiles as they were snapped at the event

A source recently said: 'Nikolai was acting a bit crazy in the Cotswolds and it has brought everything to a head.

'She wants him sorted out. Nikolai does not look great at the moment, he looks generally the worse for wear and his face is a bit bloated.

'There are definitely problems which he will have to sort out or they will be over. Friends have warned him that he will lose Kate if he doesn't change.'