Thank you all for your kind help. I have just found a WW1 Service record for another family member and in 1915 he gives his next of kins address, (his mother) as Glan Morlais Farm, Kidwelly. I have found the farm on an 1888 map on Find My APst and it is just south of the village. I think that this may be the site of the 'factory farm'!!
Bets regards
Mike