Crockpot Baked Beans

A different recipe this time; I've never used Worcestershire sauce before. I made this last night and so far the verdict from all the kids in the house (plus a ring-in) is that it's at least edible. So here's the recipe, so I don't forget what I changed. Adapted from here. (ETA: I've adjusted my original recipe again to reflect my standardised quantities. I now put this in the crockpot every Saturday night).

About 500g (dry weight) navy beans, soaked and pre-cooked (for about half an hour)
2 tins of tomatoes
1 tub of tomato paste (optional)
3 tbsp each Worcestershire sauce and golden syrup or honey
1 tbsp apple cider vinegar
2 very large onions, finely diced
handful of diced bacon (use more if you have it, or leave it out)
2 heaping teaspoons (none of these anaemic measuring spoons, just splodge it in) of wholegrain mustard
3 heaping teaspoons or 4-5 cloves of finely chopped garlic
1 tsp each cumin and coriander
1 tbsp paprika
4-5 bay leaves
water

Combine beans, tomatoes and paste, and liquid ingredients in the crockpot. Saute onions in butter and olive oil until soft, then add the other measured ingredients and stir over heat until fragrant. Add to bean mixture and stir thoroughly, deglaze the pan with some water and add to the crockpot. Finally, add enough water to cover the beans by about 2cms. I put my crockpot onto Auto (in case I forgot to turn it down) until I went to bed, when I turned it down to Low, and we woke up to an extremely fragrant kitchen. Nom.