Is there an uncut english subtitled version?

Not as far as I know. I own both a DVD-R of the British release (which is edited) and a Mexican DVD release of the original "David el Gnomo" (uncut, but with no subtitles). You can get the uncut series on DVD in Dutch too, but still, no subtitles. I've seen the English version to the point of memorizing it, so I picked up pretty fast on what was happening in the Spanish version, just by visual. If you're familiar with the book "Gnomes" then you will understand the uncut version better too. For example, the book "Gnomes" tells about how gnomes remove fly larvae from a deer's throat (which was said to be pine cones in the English version). There is a list of the edited scenes explained in detail on the "David the Gnome" Wikipedia page too.

http://en.wikipedia.org/wiki/David_the_Gnome#Alternate_Versions_of_Episodes

I love the original Spanish version and personally, I think it's much better than the English version. Hope this helps.