Azure Coat and Rachel Trevor Morgan Feathered Carnation Hat

Another Ascot debut, this outfit first appeared on 19 June 2014, Day 3 (Ladies' Day) at Royal Ascot.
It is comprised of a collarless coat in azure crepe, with self-covered buttons and patch pockets, a carnation-print silk dress and a hat by Rachel Trevor Morgan in azure straw, trimmed with her signature feathered flowers, this time azure carnations with navy edging, in keeping with the design of the dress.
For the first outing in this look, the Queen accessorized with her Boucheron aquamarine and diamond clips:

 

HM being reflected in the high polish of the Gold Cup:

 

The look was repeated the following year, on 16 July 2015, when the Queen and the Duke of Edinburgh visited Barking and Dagenham, to mark the London Borough's 50th anniversary (Daily Mail article here). This time the Queen selected a rarely-seen brooch, her Australian Opal Spray, and removed her coat, thus allowing for the first proper look at the dress:

 

 

 

On 17 May 2016, the Queen repeated the look to unveil the Duke of Lancaster's Regiment Memorial at the National Memorial Arboretum in Staffordshire (Daily Mail article here). The Queen, who is Colonel-in-Chief of the regiment, wore the Duke of Lancaster's Regiment badge:

 

 

Very soon afterwards, on 24 May 2016, the Queen repeated the look to the last garden party of the season at Buckingham Palace (Daily Mail article here). This time she wore a new diamond brooch, possibily a 90th birthday present? 

 

 

Lilac Karl Ludwig Outfit with Multicoloured Accents

This colourful outfit, perfect for the warmer months, is comprised of a v-neck, collarless, double-breasted coat in lilac crepe, a silk dress in a slightly warmer shade of lilac, with a multi-coloured floral print, both by Karl Ludwig, and a lilac straw Angela Kelly hat trimmed with a large twirl of multi-coloured straw ribbons and feathers on one side.

This look was debuted on 19 June 2009, Day 4 of Royal Ascot. The Queen accessorized it with the large diamond City of London Lily brooch and cream leather handbag and shoes:

 

Almost exactly a year later, on 11 June 2010, the Queen repeated it to attend Trooping the Colour. The Household Cavalary badge, as usual, was worn to the event:

On 3 July 2014, after a spell out of the public eye, the outfit reappeared, worn to a commemorative service for the Scottish National War Memorial at Edinburgh Castle, during Holyrood Week (Daily Mail article here). This time the Queen paired it with the diamond six-petal flower brooch:

On 5 July 2015, the Queen wore it again to attend church at St Mary Magadalene on the Sandringham estate a few hours before the christening of her great-granddaughter Princess Charlotte of Cambridge (Daily Mail article here). Aptly, the Cambridge Pearl Pendant brooch was worn:

Pale Pink Coat and Picture Hat, Rose Print Silk Dress

This look is comprised of a collarless, single button coat in pale pink silk crepe, a very simple picture hat by Angela Kelly covered in the same fabric, with flat crown and brim, whose only trimming is a wide band around the base of the crown, and a silk dress with naturalistic roses printed in shades of grey on a pale pink background. The coat is fully lined in the same silk fabric as the dress. Pink, and roses - what's not to love?

This outfit was first seen on 21 June 2014, Day 5 of Royal Ascot, accessorized with a multi-coloured diamond brooch in the shape of a spray of roses:

I must admit I wasn't totally in love with this look first time around, but when the Queen wore it again on 5 July 2015 to attend the christening of her great-granddaughter Princess Charlotte of Cambridge, I was sold! I was finally able to notice the clever detail of the coat lining, and I thought it was the perfect pastel hue for a summer christening. Plus, HM was the only lady to wear pink, and given it was a little girl who was being christened, you have to give her bonus points for that!

The Queen wore her yellow gold and diamond Singapore Peranakan Diamond Jubilee brooch for the occasion (Daily Mail main article on the christening here, on the Queen's look here):

 

 

 

The Queen wore the dress on its own to hold audiences at Buckingham Palace on 20 July 2016 (pictured below with David Hurley, Governor of New South Wales, Twitter link here). She wore what looks like her triple diamond bar brooch:

The Queen wore the same dress and brooch to attend a preview of the "Fashioning a Reign" exhibition at Buckingham Palace. Although the image was shared only on 25 July 2016 (Twitter link here), I'm inclined to think the visit took place on the same day as the private audiences, 20 July 2016:

 

Cerise Karl Ludwig Outfit and Matching Angela Kelly Hat

This outfit is comprised of a single-breasted coat in cerise crepe with transparent resin buttons and shawl collar, a silk dress in a minute floral print in shades of pink, both by Karl Ludwig and a hat byu Angela Kelly with a cerise straw brim and a crown covered in matching fabric, trimmed with a small bow, pink fabric flowers and feathers dyed cerise.

It was debuted on 20 June 2014, Day 4 of Royal Ascot, when the Queen paired it with the Saskatchewan Tourmaline Flower brooch:

 

On 4 July 2015, the Queen repeated the look on a visit to RAF Reserves 603 Squadron in Edinburgh, to mark the 90th anniversary of the Squadron's formation (Daily Mail article here). Her Majesty wore her Royal Auxiliary Air Force Badge:

 

 

The Queen repeated this look for another racing engagement on 14 May 2016, when she attended the Royal Windsor Horse Show. She wore the rarely-seen gold lacework brooch. She is seen below congratulating American show jumping athlete Kent Farrington after his win in the Kingdom of Bahrain Stakes for the King's Cup:

 

 

The Queen repeated the look on 12 June 2016 to attend the Patron's Lunch, a special street party held along The Mall to celebrate the Queen's patronage of over 600 charities and organisations on the occasion of her 90th birthday (Daily Mail article here). She wore one of Queen Victoria's bow brooches. The Queen was seen beforehand popping her head around a curtain to inspect the weather: