Their website appears to contain some news about what they're up to:
http://www.bjharvest.co.uk/ .

And acording to Wikipedia "Les Holroyd and Mel Pritchard [who died 2004] teamed up to record under the name "Barclay James Harvest featuring Les Holroyd". Lees and Wolstenholme recently (2006/7) toured under the slightly modified band title "John Lees' Barclay James Harvest"