I’d like to see things like the 52 week challenge. Save £1 in first week, £2 in second week … £52 in second week. Save £1,378 all told. Something interesting to introduce at new year and/or let people start whenever they want
Chip is interesting as well. (If you use promo code MZHUYJ you get 1% interest immediately (and so do I))
Or ability to round up to nearest pound and save the change.