Do sweet peppers get blossom end rot?

The two biggest fruit on the capsicum "California Wonder" have gone all rotten at the blossom end, any ideas why?

I had a good look and there were no little holes or grubs. 
As to irregular watering, this unfortunately does happen  , but no more this year than any other year, so I am a bit surprised.

It could be sun scorch, I hadn't thought of that, but it seems strange that it has happened on the same place on each fruit.  Although now I think about it, both were together on the same truss.

Sun scorch usually affects the sides or shoulders, it's unusual for the bottoms to scorch.

Perhaps the greenhouse was a hotter for longer periods this year, so needed more water than usual.
Dissappointing when they've got that big though 

Bottoms will scorch if the sun can get at them ! 

Pass the calomine !

The peppers do look part cooked.

an alternate idea I thought about - what about a drop in temperature?  We did get some unusually cold days in August

Its a possibility, it did get quite cold at times.  None of the other sweet peppers were affected, but they are a different variety.