[bilky asko]

Not sure how true that is. 

ITV Wales still use a skyline of Cardiff and BBC Wales Today did for many many years. 

Cardiff is the capital of Wales, and the Welsh Govt are based there, it's not a choice for those living in North Wales.

Well London is the capital of the UK and the UK government are based there, but there’s plenty who are against London-centric imagery.

Surely only independent countries have capitals, so Cardiff isn’t really a proper capital. It was just given to Wales (not until the 1950s) to pander to the Welsh nationalists, just like the 1920s made up flag.

Though this is hardly relevant to this forum, US states all have capitals, as do states within many other countries. There are numerous countries with multiple capitals, as well as some with none. Countries change capitals and gain capitals. Also, all flags are also made up - none occur naturally.