The unknown tree flowers

Well it being the month with the most bank holidays in ever, it makes sense that as we get towards May that the weather turns misreable.  Not even really bad, just annoyingly a bit cold and wet. 

Had fun setting up a budget spreadsheet today, showing what a total nerd I am, and also playing a bit with visio.  Blip is of the lovely tree which we have not been able to identify yet but is coming out in all it's white flowers.  They're very pretty whilst budding as they have these lovely little perfect circles and the branches very much give me golden ratio vibes.  I'm hoping we can identify it once it flowers properly!