First Minister Nicola Sturgeon wore her favourite red power suit for today's dramatic announcement that she will call for another Scottish referendum.

And while it is not the only red suit owned by the Scottish minister, who tends to favour bold blocks of colour, it is certainly the one most often chosen by the minister for big events.

Over the last two and a half years she is believed to have worn the very recognisable number at least 11 times - and has even donned it twice in the last week alone.

The First Minister at today's press conference (left) and (right) wearing the same outfit - with the addition of a brooch - during a tour of a manufacturing hub, Rotherham, in November 2016

Ms Sturgeon joins Jeremy Corbyn, the Queen, Teresa May and Michael Fallon at the dedication service of The Iraq and Afghanistan memorial in London on March 9, 2017

The First Minister's red dress and jacket combination is by Edinburgh-based designers Totty Rocks, who ensure that all of their clothes are designed and produced in Scotland.

Seamstresses and owners Holly Mitchell and Lynsey Blackburn are clearly delighted at dressing their First Minister, and even issued a gushing tweet in September expressing their delight at having clothed her for the last two years.

The Scottish leader favours the duo's £255 show jacket - which she also owns in tartan - and the £189 bow dress she teams it with for big events.

In fact, the fiercely patriotic leader even wore their tartan jacket for her swearing in as First Leader in November 2014 and owns a number of similar items from the designers.

According to the designers, Ms Sturgeon owns several of the designs in different colours - cerise, pink, purple - but television lighting sometimes makes it look like she is wearing the red outfit.

First Minister and SNP leader Nicola Sturgeon waves after she addressed the Scottish National Party Conference 2016 on October 15, 2016 in Glasgow, Scotland

September 26, 2016: Ms Sturgeon delivering her keynote address to delegates at the SNP Conference in Glasgow, Scotland

Totty Rocks celebrity clients include Kate Moss, America Ferrera, Sandi Thom and Gok Wan.

Ms Sturgeon has been spotted wearing the particularly eye-catching outfit in March 2016, at the STV’s televised leaders’ debate; at Westminster to meet the newly-elected SNP MP in May 2015; and at First Minister's questions at the Scottish Parliament in Edinburgh, Scotland, Britain, May 6, 2015.

The bold colour, smart tailoring and strong shoulders ensure that all eyes are on her - and she clearly sees it as an instant confidence-booster.

Nicola Sturgeon poses with supporting MSPs as they gather outside the Scottish Parliament with vote remain EU banners on June 16, 2016 in Edinburgh, Scotland

WHO ARE SCOTTISH DESIGNERS TOTTY ROCKS? The First Minister's red dress and jacket combination is by Edinburgh-based designers Totty Rocks. Totty Rocks is an independent womenswear fashion label and boutique situated in the stylish Bruntsfield area of Edinburgh. Nicola Sturgeon wearing a Totty Rocks creation with designers Holly Mitchell (left) and on Lynsey Blackburn (right) All of their Totty Rocks products are designed and produced in Scotland. Their current bestseller is the signature Totty Rocks Mac which they offer in seasonal colours and fabrics. They also sell trousers, blouses, skirts and dresses. Over the years celebrity clients have included Kate Moss, America Ferrera, Sandi Thom, Gok Wan - and of course, the First Minister. Advertisement

Ms Sturgeon at the Emirates Arena in Glasgow, Scotland, Britain, May 6 2016 (left) and (right) walking out of Bute House, Edinbrugh, with her new cabinet on May 18, 2016

Lib Dem Willie Rennie, Scottish Labour's Kezia Dugdale, SNP leader Nicola Sturgeon, Ruth Davidson of the Scottish Conservatives, and Patrick Harvie of the Scottish Greens attend the STV election debate on March 29, 2016 in Edinburgh, Scotland

Today, in a speech at her official residence in Edinburgh, Ms Sturgeon said the UK stood at a 'hugely important crossroads' and Scotland must have a 'genuine choice' about its future.

But critics pointed out that Scots would not know what they were voting on as the deal with the EU will not have been finalised.

The bombshell announcement came with parliament on the verge of passing legislation allowing Mrs May to trigger Article 50, after rebel Tory MPs and peer indicated they will back down over two key amendments.

Ms Sturgeon takes applause following delivering her keynote speech to the Scottish National Party Spring conference on March 12, 2016 in Glasgow, Scotland