Any Ideas What this is?

[skeggijon]

My plot neighbour has this bush on his plot which was sold to him as a Blueberry - but obviously isn't.
Do any of you knowledgeable folk have any ideas? The catkins have me totally foxed!

[WendyC]

Looks like goat willow. Perhaps there was a blueberry in the pot originally which died and a self sown willow took its chance.

[veggiechicken]

Agree with Wendy. Those willows get everywhere.

[skeggijon]

Thanks. I'll let him know