Why did the state unification of England and Holland, conceived by the British in 1649, not take place?

Why did the state unification of England and Holland, conceived by the British in 1649, not take place? Who was the first to abandon this plan?

The initiative of the Anglo-Dutch Republican Union came from the British – on the crest of their successes, they were confident that common political ideals would make it possible to step over the difference in the economic interests of the two peoples. But the state interests of England and Holland – the two leading maritime powers – made their cooperation possible only if the Dutch were completely subordinate to the British.