At a Commonwealth event on Monday, the Queen will sign a charter agreed upon by the 54 members of the Commonwealth.
The Queen, as in all matters, is apolitical but is signing the document in her capacity as head of the Commonwealth.
– Buckingham Palace spokesman
The Mail on Sunday quoted one Royal Household source as saying: "The Queen takes her Commonwealth role very seriously. She has discussed the charter in detail with her advisers and understands it in full."
Gay rights groups have expressed their hopes that whoever is selected to replace Cardinal Keith O'Brien will do more to champion their cause.
The director of Stonewall Scotland, a charity that recently voted Cardinal O'Brien "bigot of the year", said he hoped a successor would "show a little more Christian charity towards openly gay people than the Cardinal did himself".
Tom French from the Equality Network said he hopes "that the Catholic Church in Scotland will use the opportunity new leadership brings to reassess its opposition to lesbian, gay, bisexual and transgender equality."