My mum always makes this around my birthday (5th Nov). This is best made a day or two in advance to allow the flavours to develop and the parkin to become moist and sticky. It will keep for up to a week in an airtight container. Double the batch and make 2 cakes. Eat 1 and freeze the other for later - simply remove from the tin and wrap well in foil. Will freeze for up to 3 months.