For the new ones reading this, i installed a new clean linux lite installation, in a different vm, with internet access from the start, and the answer is that the canonical UK connection one is another NTP protocol as the Regional NTP protocole one i mentioned before(the regional University server, that here in my country is used to serve the open source ntp protocol), is a normal connection that some distros or OS do in order to update correctly their internal clocks.
As an example, sometimes the browser navigators(as chrome, firefox or brave), give errors when the internal computer or OS time isnt right, and one of the reasons of it is because the NTP protocol isnt working propertly(Or sometimes is just an program that have to be updated eg: you have an old version of chrome or firefox, etc and needs to be updated).
So for that is needed the NTP protocol connection.
Theres not a telemetry per se connection, nor a data connection, just an update internal clock/time connection.
The reason debian and arch doesnt do it by default(in arch one has to disabled the network first helper connection), is because they do it from time to time, not inmediately when one is connected to the internet. Theres some advantages and disadvantages for that. But for most people is important that the OS make a first NTP connection in order to keep all the programs updated and up and running(mostly the ones that needs internet as the example i did previously with the browsers).
Edited 1: In arch one must first disable the network automatic connection one, in order to "not make" any outside innecesary connections, and in this case, most people dont do this, so if you see some outside connections there, is just a network protocol that you can disable if you want.
LTDR:
So, case closed, the two outside connections are just NTP protocol connections that is required in all OS(in this case Distros), in order to function properly with the internet and some apps and programs. Some distros make it automatically some make it just when one open a browser or press the update button, or if theres some programed updates too.
As an example, sometimes the browser navigators(as chrome, firefox or brave), give errors when the internal computer or OS time isnt right, and one of the reasons of it is because the NTP protocol isnt working propertly(Or sometimes is just an program that have to be updated eg: you have an old version of chrome or firefox, etc and needs to be updated).
So for that is needed the NTP protocol connection.
Theres not a telemetry per se connection, nor a data connection, just an update internal clock/time connection.
The reason debian and arch doesnt do it by default(in arch one has to disabled the network first helper connection), is because they do it from time to time, not inmediately when one is connected to the internet. Theres some advantages and disadvantages for that. But for most people is important that the OS make a first NTP connection in order to keep all the programs updated and up and running(mostly the ones that needs internet as the example i did previously with the browsers).
Edited 1: In arch one must first disable the network automatic connection one, in order to "not make" any outside innecesary connections, and in this case, most people dont do this, so if you see some outside connections there, is just a network protocol that you can disable if you want.
LTDR:
So, case closed, the two outside connections are just NTP protocol connections that is required in all OS(in this case Distros), in order to function properly with the internet and some apps and programs. Some distros make it automatically some make it just when one open a browser or press the update button, or if theres some programed updates too.