Pre-heat the oven to 190oC. In a large bowl, mix together the plain flour and salt. Then add the butter and rub the ingredients together using your fingers until the mixture resembles breadcrumbs. Next, gradually add the water, mixing with a knife at all times, until the dough can easily stick together. Wrap in cling-film and leave to cool in the fridge for 10-15 minutes - or whenever you have finished preparing the fruit and syrup.