LiveOnline allows internet bidders to compete against buyers in the auction hall.
It is the first time a leasing company has committed to the system at every sale, and follows a two-month pilot.
LeasePlan’s operations director, Graham Rixon, said: “LiveOnline adds another dimension to our sales programme with BCA. By giving additional professional buyers the opportunity to bid against those in the auction hall, we are generating even more buying power for our cars.
“We have seen an uplift in residuals and we are attracting new buyers for LeasePlan stock.”