printchannels.pl -c /etc/vdr/vdr-1.6.0/channels.conf gives me the channels I want to copy to/from: ONE;T C-182-10-1005 TV2;T C-182-10-1006 TV3;T C-182-0-1003 Prime TV;T C-182-2-212 C4;T C-182-6-609
ONE_A C-0-112-1796 TV2_A C-0-119-1908 TV3_A C-0-126-2020 Prime TV_A C-0-189-2134 C4_A C-0-203-2135
Resolved this.
printchannels.pl was outputting the wrong channel details for ONE_A etc.
LSTC 101 250 101 ONE_A:112250:C0:C:0:301:300:305:A1:1796:0:1033:0
So printchannels.pl should have outputted: ONE_A C C-0-1033-1796
:)