Buckingham Palace  20th November, 2011  The Viscount Hood (Lord in Waiting) was present at Heathrow airport, London, this afternoon upon the arrival of The President of the Republic of Turkey and Mrs G?l and welcomed Their Excellencies on behalf of The Queen.  Buckingham Palace  21st November, 2011  The President of the Republic of Columbia and Mrs. Santos visited The Queen this evening.  The Duke of Edinburgh, Colonelin-Chief, Royal Electrical and Mechanical Engineers, today presented Campaign Medals in Fallingbostel, Germany.  Clarence House  21st November, 2011  The Prince of Wales this morning visited the Six Bells Miners' Memorial and subsequently opened the newly-renovated Community Centre at Ty Ebbw Fach, Chapel Road, Six Bells, abertillery, Blaenau, and was received by Her Majesty's Lord-Lieutenant of Gwent (Mr Simon Boyle).  His Royal Highness, President, Business in the Community and The Prince's Trust, and Patron, the Young Dragons, this afternoon visited Pillgwenlly Millennium Centre at Courtybella Terrace, Newport.  The Prince of Wales afterwards