Chris - I'm pretty sure No. 2 was Beech - as in 99% sure. Well, I was...
I notice (Index Fungorum) that Hypoxylon disciformis is a synonym for Diatrype disciformis?
I can't find Diatrype stigma in Jordan or on the Philips website.

'Googling' brings up a mix of pictures, some of which seem to suggest that D. stigma and D. disciformis are one and the same, but clearly this is not so from the Index Fungorum. I came up with Biscogniauxia nummularia by looking through Jordan - who incidentally gives an alternative name as Hypoxylon nummularium. I'm confused.

(Easily done!

)