In case this is useful, here's an article on investment schemes that you could set up for your child as a Christmas present this year:
www.thetimes.co.uk/past-six-days/2017-12-03/money/invest-100-each-christmas-for-your-child-and-create-a-nest-egg-worth-thousands-3j9rbfpl2
Some interesting calculations on how much £100 invested for your baby this year could be worth in 18 years' time!