This second year of fieldwork was carried out between the19 October 2020 and 7 January 2020, before the UK officially left the EU trading block (31 January 2020).
Cynhaliwyd yr ail flwyddyn hon o waith maes rhwng 19 Hydref 2020 a 7 Ionawr 2021, cyn i’r DU adael bloc masnachu’r UE yn swyddogol (31 Ionawr 2020).