AWS announced last week that they would be opening their 50th availability zone in London, giving an ever-growing customer base even more flexibility to develop ‘highly-scalable and ‘fault-tolerant’ applications.
The new London region has been given PSN (Public Services Network) assurance, which provides Public sector customers in the UK with an assured infrastructure to build their services. The PSN allows UK Public Service customers to move their UK-OFFICIAL data to the EU (London) Region, controlling the risks that accompany it.
For all customers, the ability to spread your applications over the third AZ allows you to decrease the risk profile of running your application on AWS, (spreading your application into the third AZ means that only 33% or your instance will fail if an AZ does, whereas previously this would have been 50%). The third AZ will also allow AWS to begin rolling out additional services which require three AZ’s to operate in the London region.
You can find a complete list of AWS Regions, services and prices on the AWS Global Infrastructure page.