Description of Problem: There is no en_GB@euro in locale_config. This seems minor but rapidly becomes incredibly annoying! locale_config-0.3.3-2 I expect you will mark this as a dup of bug #56301 but I think it's important enough to be separate. The euro is here now, and even people in the UK (which didn't sign up to it) have a need for the symbol. I have the symbol on RH 7.2 after following the Debian Euro-HOWTO, and I want it back :)
An en_GB@euro (or en_GB.iso-8859-15) locale, would be a C library issue, not a locale_config issue; locale_config just reads what available from the C library. locale_config could conceivably do something like set OUTPUT_CHARSET to ISO-8859-15, but that would, indeed be a dup of bug 56301. :-)
I've added {en_US,en_GB,da_DK,sv_SE}.ISO-8859-15 for the upcoming glibc-2.2.5-28.
I have just added the Euro to X on AltGr 4 for gb/uk after chatting with Alan, and both of us surfing for relevant standards. Build 4.2.0-6.52 and later will have this patch. Also added for Hungarian, Turkish, US international, and a few others.
Wonder how are you adding Euro to Hungarian (unless in UTF-8 charset), as there is no character set covering Hungarian letters and Euro AFAIK (similarly for Czech, Slovak, Polish, etc.).