As with (b) and (c), these measures were introduced on a risk basis to protect GB biosecurity and have since been reviewed following recent scientific developments;
Megis gyda (b) ac (c), cyflwynwyd y mesurau hyn ar sail risg i ddiogelu bioddiogelwch Prydain Fawr, ac ers hynny maen nhw wedi cael eu hadolygu yn dilyn datblygiadau gwyddonol diweddar;