Sticky Ginger Marmalade Tea Loaf - Lavender and Lovage

Ingredients

• 150g ginger marmalade (About a third of an 450g jar) (or normal marmalade if you are not a lover of ginger)
• 175g margarine or butter, softened
• 175g light muscovado sugar
• 3 large free-range eggs, beaten
• 225g self-raising flour
• 1 tsp baking powder
• 2 tsps ground ginger
• 1 tsp mixed spice
• 100g walnuts, shelled and roughly chopped