Well, not quite, GUEST. The opening track of Jack Of All Trades Vol 3 of the Folk Songs of Britain. is Bob & Ron Copper sining The Jovial Tradesmen

The track you must be thinking of is track 4 which has "shearing, talking to the sheep and trying to keep his dog quiet at the same time" is Jimmy White of Yellington, Northumberland singing The Canny Shepherd Laddie.