I had hoped to find an open source of historical records on pollen levels over the last 10 years ago to establish if there was some correlation between my having felt better this year than in the last 3-4 and general pollen levels. It seemed like it would be a fairly simple bit of data visualisation – line graph up the average monthly levels of different types of pollen over the last decade or so once I’d sourced the data from the National Pollen and Aerobiology Research Unit.

Unfortunately its data is not available to the public and they haven’t responded to my email. Anyone else got any other ideas for sources of open data on this?