Pea flowers missing

I sowed Kelvedon Wonder on 17th March and they have been growing vigorously except for the tips being scorched by the frost earlier in the month. Soon after the frost a few flowers appeared and I duly covered with enviromesh to protect from pea moth.

I have been thinking for a day or two that there should be more flowers appearing. I lifted the net today to look closer and in the 10 foot row there are about 10 pods about 2 inches long and just a few flowers low down.

I think that the frost may have caught the flowers developing in the growing tips. All I can do is hope that a flush of flowers appears.

Has anyone else got this problem?

We have had no real rain since February. Something like 5% of normal. Crops are growing well enough but need water for germination and establishing things planted out.

Ryegrass/clover green manure dug in where the peas are. The peas are normal height but have no flowers. The flowers low down are like the late flowers you usually get on peas. The problem is going to be that if they do decide to have a flush of flowers they are going to crop at the same time as, or later than, the later sown crop. So much for my plans of successional sowing.