It was a economy revenue booking which was originally booked as an open jaw LHR-ARN , LIS-LHR. (I booked a separate IB flight between ARN and LIS.
The LHR - ARN flight was cancelled quite a few weeks prior and picked Rerouting online via HEL. The new ticket arrived which what looked like manual ticketing - maybe why other options arnt being offered?
No options are showing online for rebooking, not even the 1 available BA flight! I have rung twice now and both times told that they cannot see any IB options on their screen.