Hi Andy B,
Grimmet et al 'Birds of India' has an illustration of juvenile, and I attach it here (3b). (I also couldn't find one online; and I agree with Butty that the photo linked by Andy A is not a juvenile).
I think you are probably right, because it looks way closer in colouration and posture than anything else in the books - but, of course, my opinion in this region is not worth much.
If it's juvenile, I would say it's part-way to adult. It has lost the flecking on the head, and I think you can see the black border to the white throat-patch starting to appear, but it still has the dark streaking on the chest.
Anyway, I hope this helps; and if it doesn't, then apologies in advance.