Brits also commit that R between two words, when the former ends in a vowel and the latter begins with one. I think they do this in Zild, as well. Thus, when they (or Bostonians) are described as having non-rhotic speech, well, it's all relative.

Also, Juan, how do *you pronounce the Worcester(shire) as in the sauce? I pronounce it Wooster, just like the town(s).