Heat oven to 180C/fan 160C/gas 4.
Beat together the butter and sugar until
pale and creamy, then add the eggs, one
at a time, slowly mixing through. Sift in the
flour, then add the lemon zest and mix until
well combined. Line a loaf tin (8 x 21cm)
with greaseproof paper, then spoon in the
mixture and level the top with a spoon.
Bake for 45-50 mins until a thin skewer
inserted into the centre of the cake comes
out clean. While the cake is cooling in its tin,
mix together the lemon juice and sugar to
make the drizzle. Prick the warm cake all
over with a skewer or fork, then pour over
the drizzle - the juice will sink in and the
sugar will form a lovely, crisp topping. Leave
in the tin until completely cool, then remove
and serve. Will keep in an airtight container
for 3-4 days, or freeze for up to 1 month.