Hi, I'd appreciate anyone who could point me to up to date knowledge about this.

My friend (no, really), who is Latvian, lives in the UK (no problem since they're both EU countries). Her Latvian passport is in her maiden name, but upon British naturalisation, she got her UK citizenship certificate in her married name--the name she now uses.

Applied for a UK passport and when you do this, you have to submit any other valid passport you have (UK or other country). Her application for a UK passport was then refused because her Latvian passport is in her old name.

Don't understand this rule as the UK happily issued the naturalisation certificate in the married name (she's married in the UK), so why not a passport? The problem is that Latvia will not change her name. I thought it was common to have a passport in one's maiden name and the new country's passport in one's married name, but it seems this is no longer possible in UK.

Any option other than cancelling the Latvian passport (and therefore having no travel document at all, unless and until the British will issue a passport?)

Thanks