Published Court Circular from The Times. That's all I know.
EDIT
I've had another look and the announcement
may have been posted too soon.
Usually, the CC is in strict order of precedence but the event carried out by Princess Royal comes before that of the Wessexes - which is wrong. But the dates are the same.
Most odd. Here is the entire day to show what I mean.
Sandringham, Norfolk
30th January, 2015
The Prince of Wales, on behalf of The Queen, held an Investiture at Buckingham Palace this morning.
Clarence House
30th January, 2015
The Prince of Wales this afternoon received Mr Serge Pun (Executive Chairman, Yoma Strategic Holdings Limited).
Buckingham Palace
30th January, 2015
The Princess Royal, Honorary Air Commodore, Royal Air Force Brize Norton, this morning attended 10 Squadron Centenary Parade and presented a new Squadron Standard, at Royal Air Force Brize Norton, Carterton, Oxfordshire.
Buckingham Palace
30th January, 2015
The Earl and Countess of Wessex this morning left Heathrow Airport, London, for Finland and later arrived at Helsinki-Vantaa Airport and were received by Her Majesty’s Ambassador to the Republic of Finland (Her Excellency Miss Sarah Price).
Their Royal Highnesses this afternoon called upon The President of the Republic of Finland at the Presidential Palace.
The Earl of Wessex, Trustee, and The Countess of Wessex, Global Ambassador, The Duke of Edinburgh’s International Award Foundation, later attended a Reception at the Government Banquet Hall, Elelaesplandadi, Helsinki.
Their Royal Highnesses this evening attended a Dinner given by Her Majesty’s Ambassador at the Residence in Helsinki.