Traditional British Bread and Butter Pudding

This is my mums recipe which she has been cookin since the early 1950s, I’ve asked her where she got it from but its been that long she can’t remember; I had cravings for this whilst recently pregnant and religiously cooked one on a Sunday which I ate all to myself as DH was on a diet and my daughter decided she didn’t like it without trying it (typical 5 yr old!) I usually don’t measure the sugar or sultanas which are scattered over the bread and just guess it, it all depends on how sweet your tooth is. Prep time includes standing time.