What tree is this leaf from?

Update: Its not silver birch and I suspect its an elm tree the trouble is the trees where this is from are huge as tall as a fully grown oak, if it was an elm it would be dead by now from dutch elm's disease would they not? So I'm trying to confirm if this is elm and if so wondering if the trees on my land have... show more Its not silver birch and I suspect its an elm tree the trouble is the trees where this is from are huge as tall as a fully grown oak, if it was an elm it would be dead by now from dutch elm's disease would they not? So I'm trying to confirm if this is elm and if so wondering if the trees on my land have developed some sort of resistance to the disease?
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