Ubuntu does not show Nano when I connect to USB

Ubuntu 20.04 LTS
Intel® Core™ i5-7200U

Nano V3 ATmega328P 5V 16M Soldered Board
Nano compatible, ATmega328 5V 16MHz, CH340, SOLDERED HEADERS

Hi, I have never managed to get my Arduino to work under Ubuntu. I have tried every forum suggestion regarding correct drivers but still nothing. Hopefully I have targeted this post at the minimum for success since I have excluded all references to the IDE or CC.

You can see from above kit info I have also tried two variants of Nano with same results.

Before attaching - run lsusb and dmesg -T | tail

Attach Nano (have tried using various cables including one newly purchased from RS Online as data cable)

Run lsusb - nothing showing as attached
Run dmesg -T | tail - no new messages

Any suggestions thankfully received.

Brian