BA later sold IAL down the river to BT who conducted an asset-stripping exercise and then sold the company on to Serco, whence it became Serco-IAL.
I've a vague recollection that STC (Standard Telephones & Cables) also figured somewhere in the IAL acquisition process.
Possibly BA to STC to BT to SERCO ?
Somewhere in the transfers, staff lost many of their original IAL benefits, including discount air fares, holiday pay, progressive enhanced leave entitlement, and low interest loans for car purchase.