my $country = uc $card->country || ''; # make sure it is UC and defined
$country = '' if $country eq 'GBR';    # blat the Brits

##</code><code>##

my $def_country = 'GBR'
my $country = uc $card->country || $def_country; # ensure UC & has a value
$country = $country eq 'GBR' ? '' : "[$country]" # blat brits, add [brackets]