Over the past week or so, I'm no longer able to access TestMy over port 8080. HTTPS works fine.
As of the 30th April 2016, the EU rules on net neutrality came into force. This means that all that traffic must be treated equally regardless of the source and destination and that ISPs are no longer permitted to block and throttle traffic.
In previous tests I carried out on the Irish Three mobile network (mobile data on Smartphones) and the UK ISP Pulse8 broadband, there was a vast difference between the throughput I got over normal HTTP compared with port 8080 that Ookla's Speedtest uses.
If port 8080 can be enabled again on TestMy, I'll have a go at making a video capture of running tests on TestMy compared to accessing it over port 8008 as well as two third party tests on my phone with the Three network, e.g. Leaseweb test file (normal HTTP download) against running Speedtest.net (which uses port 8080). If there's a clear variation, I'll put it on YouTube.