Best Spring to worst Spring

How does this happen, i have the best Spring start-up in March that I can remember and by the end of April I am feeding my bees because they have just about consumed all the honey they had stored.  I am surrounded by fields of oil seed rape in full flower and its too cold and wet for the bees to fly, so they stay at home and eat honey, until it runs out and then they starve.

So I have spent the morning making even more tubs of fondant, a boiled sugar water solution that hardens as it cools.  These are 500gm containers of fondant and are in various stages of setting.  It becomes whiter as it hardens.
I have given  a tub to every hive, these are replacements just in case this weather continues.
English weather, gotta love it