I cultured the dregs of last bottle of Orval I drank. I was thinking I'd get round to the long overdue Orval inspired home brew I've been promising myself for some time. However, as is so often the case I didn't get round to it, but the unused starter left me with about a pint of beer with a strong Orval yeast flavour.
Unlike Orval it was pretty flat though so I decided to mix a portion of it with some beer from the supermarket, as an essence of Orval additive. It worked quite well, particularly with English pale ales, though perhaps that's not surprising as that's apparently what Orval was originally modelled on.
I'm going to do this one again.