The Church of England Book of Condolences is available here

A prayer of Thanks Giving...

God of our lives,

we give thanks for the life of Prince Philip,

for the love he shared among us,

and for his devotion to duty.

We entrust him now to your love and mercy,

through our Redeemer Jesus Christ. Amen.

A prayer for those who mourn...

Merciful God, be close to all who mourn,

especially The Queen and all members of the Royal Family.

May they know the hope of your promises

and the comfort of your love,

through Jesus Christ our Lord. Amen