Ruby Red Wool Coat and Rachel Trevor Morgan Hat

This ruby red wool coat and dress combo with felt Rachel Trevor Morgan hat, trimmed with a felt flower and curling ribbon on the side, has been worn by the Queen quite a number of times. Its first appearance was on 20 March 2008, when Her Majesty attended the Maundy Thursday service at the Anglican Cathedral in Armagh, Northern Ireland. It was accessorised with a ruby and diamond brooch in the shape of a spray of flowers, that belonged to the Queen Mother:

Subsequently, on 23 October 2008, the Queen repeated it upon arrival in Bratislava, at the start of a State visit to Slovakia. Again, a brooch from the Queen Mother's collection was selected, the Australian Hibiscus brooch:

With Slovakian Presiden Ivan Gasparovic:

On the 18 January 2009, we saw again this outfit, and the Australian Hibiscus brooch, worn to church at Castle Rising in Norfolk, near Sandringham:

Then, the following month, on 20 February 2009, there was another repeat, when the Queen and the Duke of Edinburgh visited Thames Valley University to open a new building, Paragon House. A gold, diamond and ruby brooch in a modern, arched design was selected:

Months later, on 29 October 2009, the same outfit, down to the same brooch worn in February, was recycled for a visit to the Newmarket Animal Trust in Suffolk, during which a tree-planting ceremony took place:

It was then more than a year before this look was seen again in public, again paired with the Australian Hibiscus brooch, when, on 17 November 2010, the Queen visited the Advanced Manufacturing Research Centre at the University of Sheffield, donning a pair of 3D glasses:

The Queen was again in red on 31 March 2011, when she paid a visit to RAF Valley, a Royal Air Force station on the island of Anglesey, Wales,  where Prince William was stationed as a search and rescue helicopter pilot. Again, Australian Hibiscus brooch in use:

It was ever so slightly windy on the day:

Later that year, the Queen chose again this ensamble when she visited East Surrey College on 18 November 2011, accessorising with her Flower Basket brooch:

The following month, on 18 December 2011, the Queen paired this coat with a different red hat for a Sunday church service at Wolferton in Norfolk:

The coat was worn again, accessorised with one of Queen Victoria's Bow brooches but no hat, when the Queen left King Edward VII Hospital in London on 4 March 2013, after being admitted with symptoms of gastroenteritis:

On 29 January 2014, the Queen repeated the outfit when she opened the new village hall at Thornham in Norfolk, accessorising with a six-petal diamond flower brooch (and a dainty flower basket!):

We saw the outfit once again for a church appeareance when the Queen selected it on 4 January 2015 to attend the Sunday service at St Mary Magadalene on the Sandringham estate. No brooch visible, probably hidden beneath the large black fur collar. Incidentally, this appearance made front page news on British papers, as it came amid the sex scandal that embroiled the Duke of York in a US court:

After a nine-month hiatus, the outfit was worn again to the 200th edition of the Braemar Highland Gathering, a fixture in HM's Scottish engagements calendar, on 5 September 2015 (Daily Mail article here). Unsurprisingly, the yellow gold Braemar feather brooch was used:

I strongly suspect the Queen was wearing the matching dress when she received the Prime Minister of New Zealand, John Key, at Windsor Castle for a private audience on 30 October 2015. My guess is based on the similar style of the buttons. HM was wearing the gold trellis brooch:

The outfit was repeated on 29 January 2017, when the Queen attended the Sunday morning church service at St Mary Magdalene Church on the Sandringham estate (Daily Mail article here). She wore her gold lacework brooch: