I seem to recall a very very warm Easter in the mid 1980s. I think it was 1984 with some stations breaking their all-time Easter maxima. But Easter was very late that year (22nd) so that raised the chance of it happening. I think March is the month of greatest potential extremes, but April is not far behind. It is another month which can yield everything from snow to sunbathing. As an example, two years later (1986) saw a bitterly cold easterly outbreak and the CET of 5.8C was the coldest April for 60 years. Does anyone remember it?