Nipped buds on Tomatoes!

Can anyone give me an idea of what nipped off all my tomato blooms this year?  I still have a few left but no fruits yet on one plants and only one solitary tomato on the other.
They have been outside since they've been able to stand it as I have no real greenhouse space.

I have to say, I've tried 100s and 1000s toms two years running now and they have been a dismal failure both times.  They look half dead before the blooms even set in!

I agree with the last post. The weather hasn't been right for tomatoes this year, too cool and dry. The other thing I have found is that you have to help the tomatoes fertilise. Tap the plants occasionally so that the flowers get properly fertilised.

Cool nights has been a problem in many areas.
Here in north Wales it is no different.
Plenty of flowers but slow forming fruit.
I have just taken out all the flowers to let the fruit develop.
Mainly because they are never going to set now.
Besides tapping the plant spraying the flowers with water can help.
Pete

If they really are being nipped off rather than failing to set it could well be birds, and top of my list of suspects would be sparrows (not necessarily all of them but it only takes one or two to develop the bad habit.)

I've actually seen them pecking runner bean flowers off, apparently just for "fun", so this year I've suspended netting above my Munty frame to try and put them off (they're not completely enclosed and there is little danger of anything getting trapped in it and so far it seems to be working.)

My outdoor toms are much better than the indoor ones this year. 

Well, at least they were 5 days ago.