We operate at a 99.9% uptime guarantee however we have exceeded this over the last 2 years. We constantly monitor our servers and their load to see how it is increasing over time. When we deem it necessary, we introduce new servers in advance of there being a capacity problem. We also look at ways of speeding up our system by enhancing our calls and procedures.
Our excess capacity as standard reduces the risk of high user usage affecting customers quality of service. We also run additional machines in a ready state should we need to increase our capacity further at short notice.