Need help part 2

[forest tink]

Need this one identified too please guys,from end of may to the end of june its has 3 inch ish catkins coming of it and a load of sap seems to drip on the vehicles below between that period,no sap or catkins now though

[Stere]

Some kind of alder

[forest tink]

Its like a cross between alder and birch

[Yournamehere]

Populus

 

Aspen

 

Catkins

[janey]

Yep, tis an Aspen. 

[forest tink]

Thanks guys ?

[5 shires]

Young Aspen...as they get older the bark changes to more rutted type texture.