BA code share with Aer Lingus flight ?

[Mikeact]

I have to go out of LHR to Knock on AerLingus EI0915. Is there a BA number for this flight, as I’d like Highlife to deliver a couple of bottles of Gin to our seats. Thanks.

[NorthernLass]

Could be BA5989, but the delivery service isn’t available on all flights.

[BA Flyer IHG Stayer]

I don’t see BA highlife delivering duty free to an EI operated flight operated from a terminal BA doesn’t use