As suggested I moved driver lines to [all] section.
However this did not help.
I performed a RaspBerry Pi firmware + kernel update using rpi-update
upgrading to kernel is 4.19.75-v7+
Interestingly there are now two errors messages displayed when running show-udrc.sh
chk1: snd-soc-tlv320aic32x4-i2c.ko exists, Driver CONFLICT
chk2: snd-soc-tlv320aic32x4.ko exists, Driver CONFLICT
==== Sound Card ====
No udrc sound card found.
==== Pi Ver ====
Pi 3 Model B Mfg by Sony UK
==== udrc Ver ====
Found a UDRC II
HAT ID EEPROM
Product: Universal Digital Radio Controller II
Product ID: 0x0003
Product ver: 0x0001
Vendor: NW Digital Radio