Prince Philip, the queen's husband, will attend the ceremony at Westminister Abbey, where a recorded message from the queen will be played.

CNN: March 11, 2013 -- Updated 1612 GMT (0012 HKT)

The Welsh government said Welsh ministers were subject to the ministerial code, the principles of which were virtually identicial to the code which applies in Westminister.

BBC: Call for info on lobbyist meetings with Welsh ministers