Christmas carol name that tune

Whatever your religious persuasion from none to something significant, a lot of people enjoy a Christmas carol this time of year. So, as we're already getting a bit demob happy, here's the first part of an occasional Christmas quiz. As you might guess from the title, I'm going to give you a snippet from the start of five carols - all you have to do is identify them. (Apologies if you aren't from the UK - some of these tunes may not be the ones you are familiar with.)

The answers are at the bottom of the post, but try all 5 first.

So here we go (NB - embedded Soundcloud players may take a few seconds to load: please be patient!):

Number 1 - we'll start with an easy one.


Number 2


Number 3


Number 4 - probably the most obscure, so I'll give you a couple more notes.


Number 5 - to make this a little different, I've the start of the introduction, not the sung part:


I've taken these snippets from a sort of karaoke carol CD - if you have a secret passion for singing along to carols but prefer to do it without a snooty Oxbridge choir in the background, it's worth taking a look here: www.hymncds.com/christmas.html


So, the answers.


Don't peek if you haven't had a go.


Go back and try.


But if you really want to know....
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..

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Here they are:


Hark the Herald Angels SingGod Rest Ye Merry, Gentlemen (lose half a mark if you didn't mentally insert the comma)Once in Royal David's CityAs with Gladness Men of OldThe First NowellThe organ's played by the excellent John Keys - in case you'd like to hear him in full flow, here's something a bit more impressive taken from this album: