Big names such as Stella Tennant, David Gandy and Pam Hogg will attend the event, at Dover House in Whitehall, home of the Scotland Office and a location used in the last James Bond film, Skyfall.
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Nominees for the Scottish Fashion Awards - dubbed the Scottish fashion Oscars - include big names such as Christopher Kane, Jonathan Saunders and Victoria Beckham, who uses Scottish textiles in her designs.
Kane, who comes from Newarthill in Lanarkshire, will battle it out with Glasgow School of Art graduates Saunders and Louise Gray, as well as Edinburgh-born Holly Fulton for the coveted Designer of the Year gong.
Meanwhile, the Young Designer of the Year category includes some of Glasgow's most promising new labels, including Obscure Couture, Rebecca Torres and Saunt and Sinner.
Retailers up for awards include The Pokey hat, launched by Jennifer Welford from Paisley, while jewellery and accessory designers Jane Gowans and Geogia Wiseman are also nominated for gongs.
The event will be hosted by Irish TV presenter Laura Whitmore.
This is the first time the awards have been held outside Scotland - previous locations have included Glasgow and Stirling Castle - with organiser Tessa Hartmann insisting the move will give nominees the opportunity to get noticed on the global stage.
She said: "We believe London is a wonderful place to showcase the immense talent we produce in Scotland, as it's not local awareness these nominees needs, it's global awareness. There's no better place to do that than the epicentre of British fashion.
"The emerging talents and young designers highlighted in these awards are the future revenue earners in this industry, which is the fourth biggest employer in the UK and which contributes £21billion to the UK economy."