Originally Posted by
Cymro
You can move the avios earned on IB, but not the TPs, as stated.
There may be a BA flight number you can use, but even as a silver, you don't get lounge access on IB metal with a BA flight number, so the benefit is limited to the TPs and avios.
Agree that an IB account is nice to have for other reasons.
IB metal + BA flight numnber + OWS = lounge access