It can be hard to tell Stigmella microtheriella / floslactella from old mines when the frass has dried up, so I'm not sure you'll be able to record that one with certainty.The second one is Phyllonorycter coryli - the big upper surface blotches are distinctive. See:http://leafmines.co.uk/html/Lepidoptera/P.coryli.htmGeorge
Thanks George! I did check the fresh leaf for frass before taking it home so I think S microtheriella is a safe bet.
Note also that it's the frass in the first third of the mine you need to look at, as both species show clear margins therafter.