That is not available to book (just checked). Nothing direct or in business, just economy on JL or AY.

But since some of those flights are via DOH it reminds me that it's worth checking Qatar as well. Avios points can be moved freely backwards and forwards between Qatar, Iberia, Aer Lingus and Finnair as well as BA. So you could have some serious One World program signing up to do to check all the possibilities.