I know it's old-timey rather than "folk" but I thought a few visitors to this site may be interested and I haven't seen any references to it yet......the fabulous Carolina Chocolate Drops are returning to the UK for a series of dates in early 2010, as follows...

January 26 :: Celtic Connections Festival :: Glasgow, UK
January 28 :: Town Hall :: Gateshead, UK
January 30 :: Derby Theatre :: Derby, UK
January 31 :: Memorial Hall :: Sheffield, UK
February 3 :: St. George's :: Bristol, UK
February 4 :: Bush Hall :: London, UK
February 5 :: Arlington Arts Centre :: Newbury, UK
February 6 :: The Met :: Bury, UK

Or check out their site at
http://www.carolinachocolatedrops.com/