The government website is probably just a little too succinct: the requirement is exactly that - a valid passport. In other words, the passport should not expire within the duration of the visit but there is no requirement for it to be valid beyond that.
Hmmmm. I notice that you have also asked the same question in Another Place where you have received a different answer. It's worth noting that the respondant there has actually answered a different question from the one you actually asked. If you go to <https://www.gov.uk/foreign-tra…entina/entry-requirements> you will find the UK Foreign Office opinion which is:
If you are visiting Argentina, your passport should be valid for the proposed duration of your stay. No additional period of validity beyond this is required.
Hmmmm. I notice that you have also asked the same question in Another Place
Apropos of nothing, I notice that your avatar at The Other Place bears a strong resemblance to Steve Martin, about to yodel or go into his “Wild & crazy guy” routine.
