Not a tip so much as an observation that mice love pea seeds. When did you actually sow as they wont necessarily all appear at exactly the same time. If it is a while ago simply sow some more.

Thanks for your reply Moon Grower,it was rather cold when first sown but they were under plastic covers. Have bought some more seeds today,wait untill it gets a bit warmer

You could start them off in individual paper pots in the greenhouse and then plant out after you have hardened them off. None of our peas are showing yet though the broad beans are...

Thanks for thoughts .