Somewhere in London with a big bird-cage so, er, London Zoo? 
Perhaps this clue might help - The big Metal Bird cage
ha ha ha, hiya Vas, hope you are keeping well in you end of the woods.
???
One more guess from me…Heathrow?
Birdcage Walk? i.e North of the river. If you are wondering why someone from Edinburgh is chipping in, I used to live and work in London. Am I right or am I wrong?
Correct. The big bird cage is Heathrow.
Greetings from Malaysia