What on earth am I doing still lurking here sixteen years after my original posting above?
A 12" recording that included Pete's version was issued by Doug Dobell's company - Dobell's Jazz Record Shop, 77 Charing Cross Road, London WC2 with a serial number F-LAT 1, in 1959 having been recorded at the Saint Pancras Town Hall Theatre on the 4th October 1959.
THAT recording was issued as part of a double CD called "Pete Seeger in England" by Fellside Recordings - FECD273 earlier this year - see their website - www.fellside.com