Additional file 2. Supplementary Table 1: Accession codes for EIV HA1 sequences included in phylogenetic analysis figures 1. The bold sequences indicate the GISAID obtained sequences representing 2015-2016 EI outbreak in Scotland and England. Supplementary Table 2: Accession codes for sequences used in table 2 and figure 2 alignments. GISAID accession numbers are highlighted in bold.