Found it! The Youtube version of Billy cotton and his band playing/singing it has apparently been pulled because of multiple complaints about copyright. I could hum you the tune, but I can't post it. Here are the words, though. I think the second line should be something about Nicholas working nights.
"OH NICHOLAS! DON'T BE SO RIDICULOUS
(Kennedy, Castling)
A great misunderstanding, enough to make you sob,
Nicholas was working but underneath his job.
He's saw his girl by day
He'd kiss her and she'd say
Oh, Nicholas, don't be so ridiculous,
Cos I don't like it in the day time.
Oh, Nicholas, though I like you, Nicholas,
I don't like kisses in the day time.
Afternoon or evening that's too soon;
Nighttime's the right time, under a lovely moon.
Oh, Nicholas, don't be so ridiculous,
Cos I don't like it in the day time.
You said going dancing would be heaven,
And I agreed to meet you at eleven.
I couldn't do the samba while I'm yawning.
I didn't mean eleven in the morning. No!
Oh, Nicholas, don't be so ridiculous,
Cos I don't like it in the day time.
Oh, Nicholas, though I like you, Nicholas,
I don't like kisses in the day time.
Things you have to wait for seem so right -
Let's make a date for seven o'clock tonight.
Oh-oh, Nicholas, don't be so ridiculous,
Cos I don't like it in the day time.
Oh, Nicholas, don't be so ridiculous,
Cos I don't like it in the day time.
Oh, Nicholas, though I like you, Nicholas,
I don't like kisses in the day time.
Weddings in a day dress make me sob;
If I should say yes, make it an evening job.
Oh, Nicholas, isn't it ridiculous,
That I don't like it in the day time.
Source: youtube video of Billy Cotton And His Band Decca disc F9360(DR 14566) "