Re the above, turns out the version of "There's a Blue Ridge Round My Heart, Virginia" is in fact by the New Mayfair Dance Orchestra. No idea who's doing the "vocal refrain" but the trumpet break is by a gent called Norman Payne in the style of Bix Beiderbecke, not Louis Armstrong. And a jazz collector in Derbyshire has a copy for sale!

Isn't the Web wonderful and aren't I a sad person, now to find a cheap Dansette on eBay.