Turquoise Coat and Rachel Trevor Morgan Hat with Red Rose

A turquoise wool 3-button coat in a classic cut, with turned-up cuffs, complete with a Rachel Trevor Morgan straw hat with a large turquoise velvet sash trimmed with an oversized red silk rose and wispy red and turquoise feathers. The matching silk dress has a floral pattern in magenta and green on a turquoise background.

The Queen debuted this look on 19 October 2006, when she chose it for her arrival in Tallinn, Estonia, during a visit to the Baltic Republics. The Australian Hibiscus brooch was selected (this is a look that allows great versatility in stone colours, thanks to the turquoise/red combo):

With Estonian President Toomas Hendrik Ilves:

Then it was worn again on 22 June 2007, Day 4 of the Ascot races, paired with one of Queen Victoria's Bow brooches:

 

Then it was repeated the following year, on 5 June 2008, for a series of engagements in Cumbria. The Cullinan V brooch completed the look:

 

 

Then, on 6 May 2009, the Queen stood out in her turquoise outfit among the red coats of the Irish Guards, when she presented new colours to the 1st Battalion Irish Guards at Windsor Castle. For this occasion, the badge of the Irish Guards was selected as a brooch:

 

 

Later that same day, the Queen, accompanied by the Duke of Edinburgh, travelled to Northern Ireland for a 3-day visit; for this second engagement, she wore the Nizam of Hyderabad Rose brooch:

 

The Queen repeated this look once again later that year, on 13 June 2009, when she wore it for Trooping the Colour, paired, as usual, with the Guards' badge:

 

 

A year later, on 20 May 2010, the Queen repeated the ensamble for a day of engagements in Yorkshire:

 

The following month, on 14 June 2010, the Queen made an appearance at the Guards' Polo Club in Windsor for the Queen's Cup match, accessorising her coat with the Flower Basket brooch

Interestingly, the Queen drove herself to the event (and...shock, horror! She didn't wear her seat belt!):

 

 

The Queen recylced the look again on 14 July 2010 to attend a livestock show at Castle Douglas, in Galloway, Scotland. The Jardine Star brooch was worn:

 

 

On 17 July 2012, we got a proper view of the dress that goes with this coat, when the Queen wore it for an audience at Buckingham Palace with Mrs Aloun Ndombet-Assamba, the High Commissioner for Jamaica. It looks as though the Pearl Trefoil brooch was used: