Someone far, far wiser than I once told me that we tend to get the weather that America (USA) gets, six weeks after they do. Now, I know that this flies in the face of all that's scientific, but I have to admit that up until now, he's been right (he died 10 years ago, so that's at least 10 years of him being right). At the weekend the midwest had severe snow storms that killed 4 people. So I reckon we'll get one last cold snap late march/early April.
I for one won't be sowing ANYTHING until mid-March, as I don't have a greenhouse (only a cold frame that gets very ovecrowded). According to the Met Office Winter officially ends this Thursday, I don't think anyone's bothered to tell this to Mother Nature. Mother always knows best (Mother nature that is, not me, I know nothing - but I'm not from Barcelona). You may scoff, just wait and see.