I had planned to start sending orders to customers either first or second week in April but the weather has been so awful that the plants are just not ready yet. We aim to keep the polytunnel temperature above freezing but we don't heat it more than that. The result is that all the plants are fine but the roots are not sufficiently established to makes sure that they stay safely in their pots while being couriered. Having spoken to several customers, fortunately most agree that the conditions are also too cold for planting into the ground anyway.
We will all just have to wait a few more weeks; it will warm up eventually.