Ok So I moved from TalkTalk to EE.

Only change was updating WAN connection to PPP and VC info for EE.

However since change my Tunnelbroker tunnel is still transmitting packets TX count is increasing , but not seeing anything returned. RX count is 0.

Am sure previously this worked as I verified last year using the various ipv6 test web sites.

Looking around I now wonder if EE block protocol 41 (AH) but am told they filter nothing.

Anyone any ideas?

Resolved. Had to update the peer IP to my WAN IP in the tunnelbroker settings on their web site.

Weird as every-time IP changes from ISP I have never had this issue.
Guess session is maintained and reconnected to , but a change of ISP or router out for ages seems to trigger issue.

Web site won't allow me to enter a dyn dns name.