Pork is actually quite a dodgey meat to reheat.. It would have to be "burn your tongue in an instant hot" in the middle to be truly safe.. probably rendering the rest of the pie useless.. although you could wrap it in tin foil first.. and take it out near the end...
Lot of hassle really... Why not find out from your Bakers or Butchers when it comes out of his oven hot.. and arrange to be there and try it...
And I cant believe Im going into this much thought and depth over a pork pie..
But.. Enjoy The Experience... Tis What Life Is About!!