Smallish tree with pale yellow flowers/catkins?

[Passthebiscuittin]

Around us (north Oxfordshire/bucks) I've just noticed lots of very pretty trees with pale yellow flowers or perhaps catkins come out in big hedges or the odd garden. Any ideas? I wondered if they were willows - but they are upright rather than weeping . . . I would love to have one in our garden if I could only work out what they were!!

Hazels have catkins, they're quite twisty trunks though. Very interesting in a garden.
Forsythia is upright with yellow flowers just bloomed in last week. I love them. They have very reddy-brown stems, quite twiggy, not thick like trunks.

Possibly Mimosa. That is flower at present

There are other willow varieties too. If you google images of trees with catkins you might spot yours

Forsythia is a strong yellow rather than pale.

Thanks - no forsythia is much brighter! With a bit more time on my hands I had a good search and I think it may be the male catkins on a Salix caprea. I'll try and track one down!