For traditionalists, of course, Yorkshire pudding should be served before the main course and not with it.
Although as a conversation starter I sometimes break with convention and serve the roast beef dinner IN a giant Yorkshire pudding.
Serving Yorkshire pudding also allows me to repeat my favourite joke about the notoriously curmudgeonly inhabitants of that Northern county.
Yorkshire people are very much like the Scots but with all the goodwill squeezed out of them.