Apologies for not sharing the info beforehand.

I booked LIS-HEL, HEL-DEL (return)

Both outbound flights were affected by the Finnair strike and I was re-routed on British Airways (LIS-LHR, LHR-DEL).

The BA points have been credited, but I reached out to BA over the phone to request Original Routing Credit but that was the reply I received this morning via email