My good friend, Dawn, gave me this recipe over 25 years ago at my request. Her mother is English and I thought this was the best dessert I'd had in a long time! Dawn said that she sometimes uses Bird's Imported English Dessert Mix to save time. This trifle uses three batches of custard and it is recommended that you prepare each batch separately to avoid any scorching or lumping.This is an ideal prepare- ahead dessert for Christmas dinner or any special dinner. This must be made the day before you plan to serve it. Prep time does not include chilling time.