Is it me or the bad growing year we seam to be having..

I am getting about 30-40% of my tomato fruit suffering from blossom end rot.
I never had it this bad before, the pots never dry out, I am doing
everything the same as I did last year. Last year we had a great crop, so
much in fact the frozen processed toms lasted until Feb this year.

I am at a loss on where I am going wrong.. all the books say its due to the
pots drying out, but I have never let them dry out..
Any ideas

Thanks
Steve
www.ukstorms.com & www.ukspeedtraps.co.uk