We are closely monitoring reports of…/These allegations raise serious questions…/We commend the actions taken by your government…/We seek a clarification/ an explanation on these statements…

I have the honor to transmit to you a memorandum of…/Government of the United Kingdom declares that…/We would like to bring to the attention of…

The Ministry desires to inform the government of…/The Government of the United States of America advises,/ The Government wishes to draw attention to…