Beans and fleece or not?

I'm a complete newbie to veggies, but lots of enthusiasm and getting very confused. 
Help needed
I have French beans and Sugar Snap peas ready to go out in the plot.  I've already had to put the beans into bigger pots and can't wait any longer as they need to climb up something. 
Do they need protection (I'm in the Chiltern hills)?  I've seen conflicting advise.
If so what & how as once I've put big canes in how do I put fleece over, if fleece is the right stuff to use?

Or is best to just put them out, take a chance and also sow some more seed just in case?

thanks - the beans will have to take their chances.  I've got some fleece but can't be certain to get to them every frosty night, but I've got some seed left.
Can I sow that direct now or only in pots?

thanks - I think I need to learn a bit of patience, curb the newbie enthusiasm and settle into the natural flow of things.  Can't fight nature!
Decided I'll wait and sow outside at end of May for later crop as that seems the best of all if the current lot survive.  If not I've learnt a lot.

THANK YOU