You can freeze if you need to.
Set and preheat your ovens for the following: Ovens 160C (320F) and not to forget the Halogen (or Fan oven) 140C (284F ), Gass Mark 3. Please preheat your Halogen for this one. I know it doesn't really normally need it but here you do. Below will explain why.
Now it should be ready Yay, my very own clotted cream.
I don't have the huge containers that he uses so used a smaller amount, bigger ones are better but I only have a small oven so will see if it works, if not will have to empty my oven storage lol. If you want a large amount to check out his huge flat dish or ovenproof saucepan.
for 300ml of cream, I used a 20cm dish and that worked well.