(For the benefit of US readers: "faggot" means, among other
things, a type of meatball made of pork liver and heart in some
parts of the UK.)
Faggots are normally cooked for roughly an hour at 150 degrees
or so (those are Celcius degrees). If the ones you're cooking have
been pre-cooked before being frozen, they should have reheating
directions; follow those.