Savings for 17 year old

lf

My 17 year old just got notice from Nationwide that his savings account with money from family and inheritance since birth is reducing to 0.5%. Can any one advise on a better rate option for a lump sum? He turns 18 in October when he can opt for a adult savings account like Marcus.... All the accounts I can see (Virgin etc) require the child to be under 16. Is he stuck with Nationwide until he’s 18 now?Thx!

[Deleted User]

He can open a Cash ISA, not sure off the top of my head of top payer