LEDE HH5 wont connect to BT Broadband Infinity FTTC

BT Homehub 5 with LEDE Reboot (17.01.4, r3560-79f57e422d) won't connect to BT Broadband - anybody else had this issue and got any progress?

I try to connect as usual with user:bthomehub@btbroadband.com and no password (also tried username as password) using PPPoE but never acutally get a connection on PPPoE WAN port.

Anyone get any tips?

Refer to sections 7.5 and 9.1/9.2 of the HH5A PDF guide for detailed instructions:

See also [SOLVED] BT HomeHub 5a and BT Infinity can't connect