Cosmo, you might get past that BER, without much delay.
If my tomatoes have that, and it's not a common problem with my neighbor's conscientious watering of both our gardens

, it's in the earliest fruit.
Those fruits are so often weirdly shaped, unavailing things. Hey, I think that's the first time I have used that word - unavailing. (Thought about using the word "fruitless"

.)
I have some blossoms on 2 tomato plant here at home. Since they are (checks sticker) a Sweet 100 and something where I can't find the sticker because there are mustard greens growing around it - I may have some cherry tomatoes soon. I believe, and should know soon enuf since the mustard greens are ready for the kitchen, that the #2 blooming plant is a Sungold, those should be first

. This is such a more-protected environment that the plants have here at home, they have far more healthy growth than those in the big garden. Out there, I just hope that I've knocked down the flea beetles that were making their lives so difficult, besides the winds and low temperatures.
Steve