Reheating a whole shoulder of pork?

[footballcrazy11]

I cooked a 2kg piece of pork yesterday but we finished up being late back and didnt fancy a big meal.
I foiled it and put in the fridge but now I don't know how to reheat it without it drying out. Shall I put it in the slow cooker with the juices or in the oven or does it need slicing?
Any advice would be great please.

I would slice and reheat as it will take a long time for the centre to warm up if it's in one piece, leaving the outside dry and risking food poisoning!

Thanks. Would you do it in the oven or the slow cooker?