The first shot shows Matt wearing a cream coloured long coat.
From what I understand this is a costume Ray Holman was developing for the Eleventh Doctor to wear. For whatever reason it was shelved.
Ray can be seen in the mirror taking the photo.
It’s hard to tell, but Matt may or may not be the All Saints boots which were his specific choice.
It’s amusing to remember that costume designer Ray Holman also choose the Belstaff coat for Sherlock, and this look isn’t so far removed from that.
This waistcoat doesn’t have the extended points at the bottom.
The jacket over the top has brass military style buttons.
The discarded t-shirt can be seen hanging on the rail behind him.
The jacket and waistcoat look to be the same - don’t be distracted by the very different lighting between this and the previous shot.
The Doctor is in the building!
The last photo, which Karen Gillian posted on Twitter, is the very first time Matt and Karen were taken together in full and final costume.
Matt’s jacket is the Harris Tweed seen in Time Of Angels and if you look closely he is wearing a blue bow tie with the burgundy shirt (as above), a colour combination never seen in series five.