I'd speculate reason for your extremely poor service is the link here:
3 9 ms 9 ms 17 ms brhm-t2cam1-a-v121.inet.ntl.com [213.106.228.117]
4 * 30 ms * brhm-t2core-a-ge-wan61.inet.ntl.com [213.106.231
As ntl in their infinite wisdom don't monitor packet loss, and as India tends not to have the skill / willingness to spot these issues or the contacts to report them it's a bit screwy and these things don't get noticed for ages.
Seems fine at the moment though, no packet loss to there at all so guess someone noticed. 24 - 48 hours to spot it is gack though