Temperatures in the tunnel are over 10 degrees for much of the day so the seedlings are beginning to grow again and will benefit from a bit more room I grow my sweetpeas in Rootrainers which encourage long healthy root runs. Rootrainers are basically black plastic cells which come flat packed with a hinge at the base - you fold them up and fit them into a plastic tray which gives you approximately 32 planting spaces. They spaces are much longer and narrower than plant pots and have grooved sides which guide the roots into going straight down. There is not a base to the cells, so when the roots emerge at the bottom they are air pruned (die off at the tips). This in turn sends a message back up to the plant to send out more roots.
You get the seedlings out by unhinging the cells so that there is minimal disturbance.
I find that the roottrainers are amazing things - it is very tempting to keep unfolding the cells just to see how the roots are doing.
But now the cells are full of roots and it is time to pot them on into large 2 litre rose pots - then with a bit of sunshine they should romp away. The top photo was taken outside last May.