Level Four support is designed for businesses that require comprehensive, around-the-clock assistance, guaranteed response times and additional on-site support. It provides priority telephone, email and remote access support 24 hours a day, Monday to Sunday.

The subscription includes a 2-hour response to system failures, an 8-hour response to other support queries and three on-site callouts per year. Level Four customers are also provided with a dedicated Priority Service telephone number and email address.

The Level Four annual subscription is priced at £3,000 per year.