Albion Records have a project to record all of RVW's English folk song arrangements in four albums. I received Volume 1 yesterday.
I wasn't sure what to expect but was pleasantly surprised by Folk Songs from Sussex (1912). They don't really sound like folk songs and it made me wonder how much 'arranging' had been done. They brought to mind Mahler's Wunderhorn songs in their sophistication, not that RVW would thank me for that.
Six English Folk Songs (1933) and Sea Songs (1919) were more like I expected and a lot folkier.
I have a disc from EMI - Robert Tear and others - which I will have to revisit. As well as English songs and carols it contains French songs and songs from Newfoundland.