Oh ...... plenty of time Bionic. Are the Light Sussex pure breeds or a hybrid based on a Light Sussex?
We have had many Black Rock over the years. They have all been wonderful, hardy layers. When we bought a couple of hybrids in the Autumn, my daughter chose Bluebelles. They came into lay in Nov. and have been laying right through the winter. Our pure breeds, regardless of the time of year, have all taken a little longer to mature and begin laying.
They may venture further afield in time but sometimes that can be problematic! Mine get everywhere and it can only be a matter of time before Foxy Loxy discovers they have found the wood.