Equipment for Making the Tea

The Turks do it another way

But that is for a completely different type of Tea.
So let us look at the Boil Water step in our English Tea Recipe.
Disregarding for the moment that this is probably control in a Common Resource, the typical English Kettle has a switch that once you have put water in it will boil the water and then stop.
The Recipe to make tea hands over to the kettle for that process action.
While the kettle is boiling it is executing the Boil Water part of the Control Recipe for your cup of tea.
Of course you do not Have to have an Electric kettle, you could use a pan on a gas ring, or a camp fire, just for example.