hollier than thou

Yes, well why not use The Prickleye Bush? After all, everyone else is using it for anything these days.

Shepherds Hey is evocative of Cotswold Morris. It is also a well-known tune, a tape or CD of which was probably lying around the drama production office for instant recycling by researchers who can't be arsed to match music to subject matter (which appears, from the bit I heard, to be some rather silly people on na Mediterranean island which has its own musical tradition).