Roll up, roll up
1. When he is king, we will give him a king's gifts.
A carol for choirs rather than congregations, but and certainly the hardest one of the set. But it gets done pretty regularly by King's College Choir, and gets plenty of airtime on classic FM and the like. By a real composer, and for once it isn't John Rutter.
4. Mitten im kalten Winter
Is it the German language that's thrown you? It does get sung in English as a congregational carol, but not often. It is however fairly ubiquitous - in German - in carol services (including this year's King''s College one), and on the radio. Logically it fits pretty early in the nativity story, up there with all the begettings. Another one by a real composer, some of whose other hits have been covered by Mike Oldfeld.
7. The star shines out with a steadfast ray
So think, people. Who followed the star? Another strictly choir-only one, and another mega-hit of the choral repertoire. Its composer was a friend of Wagner, and nowadays is probably best-known for this carol (Op. 2 No. 8, apparently), at least in Britain. Its original German title is "How beautifully shines the morning star".
12. Oh hush the noise, ye men of strife
How you all missed this I have no idea. A hugely popular congregational carol, right up there with O Little Town or In The Bleak Midwinter. Lyrics from New England, tune trad. arr. Sullivan (of G&S).
15. Then why should men on Earth be so sad
Usually done as a carol for choir, but I've heard congregations belting it out lustily too. Like number 8 (The Coventry Carol) this one has a geographical title, though it's often just called by its first line. Again, ubiquitous.
C. Feigning joy and surprise at the gifts we despise
A 21st century Christmas hit. This Christmas I've seen the video on TV twice, and the band's Top Of The Pops appearance on the TOTP2 Christmas edition. You really should know this one.
Christmas Time (Don't Let The Bells End) (The Darkness) - guessed by Lisa
J. Now we have been through the harvest
I'd think it was embarrassment that stopped you guessing this, but Phil got both Mud and the Wombles so that can't be it. This bloke has pumped out many Christmas singles, most of them pretty bad. This one (I think) was his first foray into the genre, and is quite decent. Your Mum probably knows the answer.
L. It was Christmas day in the jailhouse, the old man sat in his cell
This one wasn't strictly a Christmas single despite its first line (it was released in November 1965 so was probably in the very low reaches of the chart at Christmas). It was a comedy record, like all his others, including the one that was a very decided Christmas hit in 1971. The one you're guessing had more of a satirical edge than most of his songs. Of course, when you hear his name it isn't usually songs that spring to mind at all: it's a saxophone piece (played by Boots Randolph). Appropriate music with which to end this post....