Granny Mary’s Wheaten Bread

1kg (2 1/4lb) wholemeal flour

200g (7oz) porridge oats

25g (1 tbsp) salt

15-20g (3-4 tsp)/15-20g bread soda

2 eggs

100ml (3 1/2oz) olive oil

75ml (3 tbsp) treacle

50g (3 tbsp) caster sugar

110g (6 tbsp) coarse pinhead oatmeal

1200 ml buttermilk

75g mixed sunflower and pumpkin seeds

Equipment

1 large rectangular tin with edges 32cm/13 inch (length) x 23cm/9 inch (width) x 5cm/2 inch in depth