The British have been doing a lot of good Sci Fi lately and from the trailer and some of the photos of the upcoming mini series Day of the Triffids they may have another one to add to that collection. From what I read there was once a series in 1981 which I never saw  but I have seen the movie of it done in 1962. Which I have embedded at the bottom of the page. Sadly some series never made it to this side of the pond. But I am hoping that BBC America or SYFY will pick it up if it is a success.
BBC one has three clips of the miniseries . Unfortunately they are not available in my area. However Youtube had them and here they are in HD.

As an added treat to those trailers here is the 1962 movie version of  the Day of the Triffids .