Rotala Plc is a United Kingdom-based company, which is engaged in operating commercial and subsidized bus routes for businesses, local authorities, and public and private individuals. The Company’s principal activity is the provision of bus services, and all activities take place in the United Kingdom. Its operating companies include Diamond Bus Ltd, Diamond Bus North West, Hallmark Connections Ltd and Preston Bus Ltd. The Diamond Bus Ltd provides bus services in the West Midlands and Worcestershire areas. The Diamond Bus Ltd operations span Worcestershire and the West Midlands, operating from three depots in Tividale, Redditch and Kidderminster. Diamond Bus North West is based in Bolton, Greater Manchester Diamond North West, which provides a mix of commercial and contracted bus services covering Leigh, Wigan, Bolton and Greater Manchester. Hallmark Connections Limited operates predominantly from the Stanwell, Middlesex depot, which is situated next to Heathrow Airport.