I’ve been using plum for a few years now and I think it’s great. You can set up different rules to put money aside each week and it builds up so quickly. Highly recommend. I usually save up money for Christmas and I always have a nice little lump sum by the time I start shopping. If you sign up and refer 3 friends, you’ll get £75!
https://friends.withplum.com/r/Q4oj8InBRx