Marshall Motor Group has added three more Vauxhall sites to its network after completing the acquisition of Lisles Motor Group for an undisclosed sum.

The three sites are located in Knebworth, Hitchin and Welwyn Garden City. The Hitchin site also represents Alfa Romeo from a separate showroom.

Both the Hitchin and Knebworth sites have Esso filling stations.

All of the Lisles staff will be transferred to Marshall.

Roger Knight, Marshall chief executive, said: “As two private family-owned businesses, there are many similarities between Marshall and Lisles. We expect the integration process to be simple and quick to complete.”