01 - Set oven to 350°F. Grease and line a 2 lb loaf tin with parchment paper.
02 - Beat butter and caster sugar until pale and fluffy using an electric mixer or wooden spoon.
03 - Add eggs one at a time, mixing thoroughly after each addition.
04 - Gently fold in self-raising flour, lemon zest, milk, and salt until just combined, avoiding overmixing.
05 - Transfer batter into the prepared tin and level the surface. Bake for 40 to 45 minutes or until a skewer inserted in the center comes out clean.
06 - Combine lemon juice and caster sugar, stirring until sugar dissolves.
07 - While cake is warm, poke holes on top with a skewer and slowly pour syrup to allow absorption.
08 - Leave the cake to cool completely in the tin before removing onto a wire rack.
09 - Mix icing sugar with lemon juice to a thick, pourable consistency and drizzle over cooled cake.
10 - Allow icing to set before slicing and serving.