Energy provider and FiT

[HomeFarm]

Our existing energy provider is OVO. We pay 14.5p per kW and feed-in-tariff is registered with them.

Our DNO IS Scottish Power and they won't fit an Economy 7 meter.

Our contract with OVO is coming to an end, and they want to increase our fee to 15.7p. I was going to shop around, and if I find a new cheaper provider  does anyone know what happens to our FiT payments? Do I need to register again with the new provider?

We have an air source heat pump, so I need the best unit rate we can get.