May 21 (Reuters) - GKN automotive owner Dowlais Group on Tuesday warned of lower revenue in 2024 after a weak first half, hurt by increased volatility of production schedules for certain battery electric vehicle platforms.

Shares of the company, which was spun off from aerospace supplier Melrose Industries last April, fell as much as 7.6% to a record low of 71 pence. They were down 5.5% at 0830 GMT.

The supplier of drive system technologies and ePowertrain to carmakers said it remained confident in delivering operating margin expansion and free cash flow growth for the full year.

However, while current industry forecasts expect an improvement in the second half, after a weak first half, some uncertainty remains, the company added.

For the four months ended April 30, Dowlais' adjusted revenue declined by 1.9% to 1.7 billion pounds ($2.16 billion), on the back of weak ePowertrain revenue due to volatile battery electric vehicle production volumes. ($1 = 0.7872 pounds) (Reporting by Yadarisa Shabong and Eva Mathews in Bengaluru; Editing by Eileen Soreng)