Garden blackbird.
I'm thrilled that you find the photo suitable for your artwork. As long as you credit the source appropriately, you're more than welcome to use it as a reference for your blackbird in flight piece. I understand the struggle of finding quality reference photos, especially for British wildlife, so I'm glad this one fits your needs. Feel free to use it to bring your artistic vision to life, and I hope your client loves the final result!
It is my image!!