I'm sorry, but this has been driving me mad for years! So begging for your help 
I think I watched this at night, probably on bbc2 or channel4... it was certainly back in the days of 4 or 5 channels. (Yes, am old 
)
Unfortunately remember very little... there was a scene with a man 'singing' an 80s/90s type new romantics type song. In a field. With sheep.
It was definitely a weird humour type film. From what I recall, like an 80s/early 90s mamma mia, so quite a soundtrack.
There were some romantic type misentanglements, possibly a treehouse (??) meeting, and a final scene where bride is about to marry the wrong man, when the 'hero' enters the church and breaks into song. Again. The sheep may have been there too.
Now either it's the weirdest, most detailed (and sheep involved) dream I've ever had, or it does exist somewhere other than my imagination.
Please wise MNers, help me! (or co-sign my admittal papers)!