If Prince Philip became First Sea Lord

What might happen if Prince Philip became First Sea Lord before Elizabeth became queen?

The Navy would gain an unusually influential senior advocate, potentially changing later defense policy and opening a path toward Chief of the Defence Staff.

Philip could become a powerful advocate at the top of the Navy, especially after Elizabeth became queen. His continued service would create awkward constitutional and promotion questions because his wife was the monarch. If he remained on the active list after serving as First Sea Lord, promotion to Chief of the Defence Staff could also arise. His influence might strengthen resistance to defense reviews that reduced naval capability.