*sighs* yes ... does look like BT is shaping p2p bandwidth during peak hours. And looks as though it's not related to any range of ports.
Thank you for the update.
I believe there are 'still' ISP's which do not shape p2p bandwidth in UK. Obviously BT is not one of them. We did have a couple of UK mod/valued members on these forums who kept us up to date on which were good ISP's afatk. But one retired, one left for bluer fields. lol