The takeover will see Booker make its return to the stock market as a public company after two years in private hands. If the new company is formed after shareholder approval, it is expected to float on June 4 as Booker Group Plc.
Blueheath chief executive Mark Aylwin told Convenience Store: "We're in early discussions with Key members and are keen to stay involved as we believe very strongly in Key."
In a statement Booker said: "Booker is excited about the opportunities for Blueheath/CTM to continue its membership of Key Lekkerland."
The reverse takeover saw Blueheath acquire Booker by issuing 1.34 billion new shares. Booker's shareholders, Baugur and Bank of Scotland, will retain their holdings and will own 90% of the combined group.
City analysts have suggested the only real reason for the reverse deal is to give Booker investors an easier exit.