Preheat your oven to 180°C / 160°C fan / 350°F / Gas 4. Grease and line a 2-pound loaf tin/pan (900g) with baking or parchment paper.
In a large bowl, using a hand mixer, beat the butter and sugar together until the mixture is very light and fluffy. Approx. 1-2 minutes.
Add the eggs one at a time, beating well after each addition.
Mix in the milk and the zest of the two lemons.
Gently fold in the flour, baking powder, salt, and mix until combined.
Spoon the mixture into the prepared loaf tin and smooth the surface of the cake batter to level it.
Baking: Place in the pre-heated oven and bake for 55-60 minutes until golden and a toothpick or skewer comes out with a sticky crumb or two attached. Watch it carefully as it has a tendency to easily over bake. If it is getting to brown, place a folded piece of foil over the top of the cake like a tent. This will help prevent it from bronwing further.
Lemon syrup glaze: Meanwhile, gradually mix enough lemon juice with the icing sugar until it dissolves to form a thin paste. Depending on the quality of your lemons this could be one or both of the lemons.
As soon as the cake comes out of the oven, use a toothpick or skewer to prick holes all over the top of the cake and pour over the lemon syrup.Leave to cool completely in the tin, you can place the tin on top of a wire rack to help it cool faster.