German naval strategy if Britain will intervene in 1914

What naval strategy might Germany use for a France-first or Russia-first plan if it knows Britain will enter the war after a move through Belgium?

Avoiding Belgium creates the possibility of an amphibious move against France, while Britain would initially watch how that difficult operation developed.

If Germany wants to avoid British intervention triggered by an advance through Belgium, an amphibious assault on France becomes one possible alternative. The response raises that option without laying out an operational plan. Britain would initially watch the attempt with interest. The Russia-first part of the question receives no separate answer here.