Help me help a song thrush!

I’m in Bolton near Manchester. A bird was stuck in our trampoline, kept flying against the mesh. What I think was it’s parent/partner was on the outside with a worm. We went out, gently move the trampoline onto it’s side to allow the trapped one to walk out, which it’s did. The parent bird came back after we moved away. 

The parent bird has now flown away and not come back, and I don’t think the first can fly. It’s been in our garden for a good hour now.

I have no bird knowledge at all, Google has helped identify it as a song thrush, which I have now discovered is conservation status red! 

Is there anything I can do to help it?! The local cat mob is due soon!