The Roman Catholic Bishops' Conference for England and Wales has officially approved the order of service and prayers for a Mass to be said on the Feast of the Solemnity of the Most Holy Trinity (Sunday 3rd June) 2012 as part of the nationwide celebrations throughout June to mark the sixtieth anniversary of Her Majesty The Queen's accession to the British throne.
During this special Mass, the first reading is to be replaced by a reading from the first book of Kings in the Old Testament, chapter III, verses eleven through fourteen: -
"And the Lord said unto Solomon: Because thou hast asked this thing, and hast not asked for thyself either long life or riches, nor the lives of thy enemies, but hast instead asked for thyself wisdom to discern judgement, Behold I have thus done for thee according to thy request, and hath given thee a wise and understanding heart, insomuch that there hath been no one like thee before thee, nor shall there arise such a one after thee. Yea, and the things also which thou didst not ask, I have given thee: riches and glory, as that no one hath been like thee among all the kings in all days heretofore. And if thou wilt walk in my ways, and keep my precepts, and my commandments, as thy father walked, I will lengthen thy days."
The prayer to be used for The Queen at the Thanksgiving Mass is as follows: -
V: O Lord, save Elizabeth, our Queen
R: And hear us on the day we call upon you.
V: O Lord, hear my prayer.
R: And let my cry come before you,
V: The Lord be with you.
R: And with your spirit.
Almighty God, we pray
that your servant Elizabeth, our Queen,
who, by your providence has received the governance of this realm,
may continue to grow in every virtue,
that, imbued with your heavenly grace,
she may be preserved from all that is harmful and evil
and, being blessed with your favour
may, with her consort and the royal family,
come at least into your presence,
through Christ who is the way, the truth and the life
and who lives and reigns with you
in the unity of the Holy Spirit, God,
for ever and ever.
The Oxford blog, Once I Was A Clever Boy, has more information and also an argument that prayers for the monarchy should be re-instituted to every Sunday Mass in England and Wales.