Finally made a start on sowing some seed today in the greenhouse, sowed 5 trays of cabbage ( Spitfire ) and 4 trays of lettuce ( Dublin, Estelle and Pinokkio ). Cannot afford to have the heating on in there so I have put them into an homemade propergator inside the greenhouse put some sheets of glass on the top of them and then cover them in fleece, hope it works.