Vodafone users left furious as the broadband provider was hit by a major outage

Numerous online tools allow you to test your internet speed.

But perhaps the most popular is Speedtest.net from Ookla (an American data company), which you can find here.

You can also download the app here:

It tests your speeds in a number of ways using local servers, giving you a fairly accurate representation of your real-world download speeds.

This heatmap shows where user-submitted problem reports are concentrated over the last 24 hours.

It is common for some problems to be reported during the day.

Downdetector only reports an incident when the number of problem reports is significantly higher than the usual volume at that time.

Vodafone users were affected by a major outage this morning.

According to DownDetector, more than 700 users have reported problems with the broadband provider.