200g/7oz blueberries
150²µ/5Β½΄Η³ϊ golden syrup
1 tsp baking powder
175g/6oz golden caster sugar
110²µ/3ΒΎ΄Η³ϊ caster sugar
pinch salt
175g/6oz self-raising flour
1 vanilla pod, split in half lengthways, seeds scraped out using a sharp knife
175g/6oz unsalted butter, softened, plus extra for greasing
250ml/9fl oz double cream
3 free-range eggs
6 egg yolks
250ml/9fl oz full-fat milk