White Outfit with Pewter Pixel Detail and Contrast Black Piping

The Queen debuted this look on 5 June 2014, during her visit to France to commemorate the 70th anniversary of the D-Day landings.
We first got a peek at the dress at St Pancras railway station in London, where the Queen marked the 20th anniversary of the opening of the Eurotunnel. The dress was worn underneath a white coat with navy bow trimming:

Upon arrival in Paris, the Queen emerged in a new short jacket and hat. The dress is minutely embroidered with pewter-coloured sequins that form a sort of pixelated motif, while the jacket is white silk/wool crepe trimmed with a large band of the same sequinned silk and contrasting black piping. The same trimmings are empoyed on the Angela Kelly white straw hat (Daily Mail article here). The Queen had swapped brooches as well, selecting the Botswana Sorghum brooch in favour of the sapphire and diamond grapes she had worn on departure:

 

The Queen repeated the outfit, minus the hat, on 4 July 2016, when hosting a reception at the Palace of Holyroodhouse in Edinburgh to recognize public service in Scotland (Daily Mail article here). This time she wore no brooch:

 

 

Angela Kelly Beige Bouclé Outfit and Sequin Trimmed Hat

By far not my favourite outfit in the Queen's closet, this Angela Kelly outfit is comprised of a beige and pale pastel bouclé collarless coat with a fringe trim and sequinned buttons and a hat covered in the same fabric, with a rather elaborate sequinned flower trim to one side.
This outfit was debuted on 30 April 2013, for a ceremonial welcome in the quadrangle of Windsor Castle for President Sheikh Khalifa of the UEA (Telegraph video here). The Queen Mother's Palm Leaf brooch completed the look:

More than a year later, on 30 December 2014, the Queen wore this outfit again for church at St Mary Magdalene on the Sandringham Estate. This time she accessorized with the Frosted Sunflower brooch, gold being a better choice in my opinion as diamonds tend to disappear against the muted palette of the coat:

The Queen wore the dress that goes with this coat on 12 March 2015 for audiences at Buckingham Palace (below, Her Majesty is seen with the Ambassador of Qatar, Mr Yousef Ali Al-Khater). The Queen wore the Duchess of Cambridge's Pearl Pendant brooch (hidden from view in the photo below; note the patch pockets on the dress that echo those on the coat):

The ensamble was then worn on 19 May 2015, for the second garden party of the season at Buckingham Palace. This time, the Jardine Star brooch was worn:

The Queen repeated the look on 6 September 2015, to attend the Sunday morning service at Crathie Kirk on the Balmoral estate (Daily Mail article here). As usual with this sort of appearances, it's difficult to discern which brooch Her Majesty is wearing, although I suspect it *might* be her diamond and gold rose spray one:

On 28 February 2017, the Queen repeated the look to officially open refurbished areas of the Charterhouse, a historic complex of buildings in London dating back to the 14th century that operates today as an almshouse to male pensioners (Daily Mail article here). She wore no brooch: