If I switch how does Bulb know that I have an economy 7 meter installed?

Currently with Eon paying way too much for electricity. I have an economy seven meter as we have electric only heating powered by a vintage/retro rebuilt Nightstor boiler on a wet radiator system. I’m a switch virgin and a nervous wreck. How will Bulb know that I have an economy 7 meter fitted? Our beloved boiler charges using cheap rate electricity overnight so I need cheap rate. I don’t really understand how it works.

Currently with Eon paying way too much for electricity. I have an economy seven meter as we have electric only heating powered by a vintage/retro rebuilt Nightstor boiler on a wet radiator system. I'm a switch virgin and a nervous wreck. How will Bulb know that I have an economy 7 meter fitted? Our beloved boiler charges using cheap rate electricity overnight so I need cheap rate. I don't really understand how it works.

During the quote process one of the question which will be asked is “do you have an Economy 7 meter”.