Will my Sweet pea flower?

They'll flower - you might not get huge flowers on 9"-10" ramrod straight stems but hey ... sweet peas are sweet peas and I rather like the twisty stems!

 

Hi i'm in middlesex and my sweet peas are in full flower at the moment,lovelly flowers

 

I grew my sweet peas from seeds. They were free with the gardeners world magazine. 25th Anniversary sweet pea.
I got a 100% germination. They are in the ground and I have tied them to a mesh frame. Early stages I did pinch out the 3rd pair of leaves so they would bush out. They are looking really healthy.