It's Roud 3464 and is also on Put a Bit of Powder on it, Father (MT CD 305 & 306), Musical Traditions double CD of Walter Pardon miscellanea. The sleeve notes are available on that site and include full lyrics of each track.

They also comment The fact that there are only eight Roud entries for this salacious morsel might well indicate that it has been ignored by earlier British collectors, since many country singers, and particularly Travellers, know it - if they can be persuaded to sing it (and if the company is appropriate). It could, of course, be a quite recently-composed song. George Spicer's version is on the Veteran Tapes Ripest Apples (VT107).