Performance and Availability of UK Government Websites in 2018

Over the period of 1st June – 30th June 2018, tested 2653 domains for website availability and load-time. To establish performance benchmarks, we referred to the StatusCake Uptime and Downtime Cheat Sheet, which converts uptime percentages into monthly and yearly downtime in days, hours, and minutes.

In the period tested, the average uptime of the domains was 97.12%, which equates to over 20 hours of average downtime per month, and over ten days downtime over the course of the year! This also falls short of the recognised standard of 99.90% minimum average uptime.

In terms of load time, the average performance was a respectable 0.97 seconds, with Sandown Council experiencing the slowest load time of 9.76 seconds, and Stirling Council enjoying the fastest load time of 0.01 seconds.

How We Tested Performance

To undertake this research, StatusCake tested the availability of the homepage of 2653 domains every ten minutes over the period of 1st June – 30th June 2018 (inclusive). If a website was unavailable when tested, an error was recorded. Over the course of the month, average uptime was calculated by the number of times the availability of a particular domain was tested, divided by the number of times an error was recorded. Therefore, a domain with 100% uptime was available every time it was tested in this period, while a domain with 0% uptime was down every time it was tested.

Load time was tested from the point after which the DNS lookup ends to the point at which the page has fully loaded. This takes into consideration account files and images but does not include scripts, such as JavaScript and Ajax. This was calculated to the nearest millisecond, and forms an accurate picture of the type of load time the typical end user would experience.

Best Performing Domains

Over the course of our testing period in June 2018, we are pleased to report that 964 domains experienced no down time at all in the period tested.

Of the 36% of sites that enjoyed 100% uptime in June, the average load time was 0.47 seconds, this is under half the average load time of the domains overall, suggesting that reliable websites also tend to be faster and ultimately easier to use.

To calculate a best performing website overall, we have looked at the 964 sites which experienced 100% uptime, and filtered these domains by load time. This method identified the Food Standards Scotland website as the best performing domain, registering 100% uptime and an average load time of 0.005 seconds.

Worst Performing Domains

We’ve looked at some of the best performing domains, but now it’s time to take a look at some of the domains which didn’t fare so well over the course of our testing.

We were surprised to find that 287 (11%) domains experienced average downtime of over two hours during the course of a month, which equates to over a day of downtime over the course of a year.

If the two hours of downtime per month experienced by 11% of domain is a worry, the 10 hours of monthly downtime must be a serious concern for the 6% of websites which registered an average uptime of 98.6% or lower.

Unfortunately, for some domains, it gets worse, as 4% of websites tested experienced average downtime of over one full day in the course of the month, representing over 12 days of downtime over the course of a year!

We were able to identify a best performing domain in our testing period, and it’s only fair that we also recognise the poorest performing domain we tested. That dubious honour goes to Kidderminster Town Council, who experienced an average uptime of just 17.47% in our testing period of June 2018 .


Our motivation in carrying out this research, was not to identify the best or worst performing domains, but to understand how the UK government websites fares when it comes to average uptime. The answer is a mixed bag, with 22% of domains falling short of the generally recognised standard of 99.90% minimum average uptime. Despite this, over three quarters of the domains we tested did either meet or exceed these standards, meaning that the government is doing more than right than it is wrong when it comes to maintaining its websites.

Nevertheless, as we have highlighted in the course of our research, website downtime is a serious problem for national and local authorities as much as it is businesses. If a local council website is down for just two hours a month, that adds up to one whole day over the course of the year in which local residents cannot access potentially crucial information about their council.

The research also raises the question as to what extent local authorities are satisfying the ‘Local Government Digital Service Standard‘, a 15 point common approach for local authorities to deliver good quality, user centered, value for money, digital services. While there are no specific guidelines on average uptime, the standards do stipulate that local authority websites should ‘plan for the event of the digital service being taken temporarily offline’.  You can find out more about Local Government Digital Service Standard in our article, StatusCake & UK Local Government Digital Service Standard.

Ultimately, this research reinforces the need to invest in a dedicated website uptime and performance monitoring service, which can alert you instantly the moment your site goes down. StatusCake provide a suite of performance monitoring tools which are easy to set-up and use, and provide you with invaluable insights into how your website’s performance is impacting your customers’ experiences.

Click here, to start your free trial today.

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