Leeds build society young saver
Hargreaves landsdown junior stocks and shares ISA
I went with moneybox. They've got a collection of different ISAs. Their junior one you can send links to family for them to add money to it for presents etc
Hargreaves landsdown junior ISA as aswell
Fidelity Junior SIPP
Also Tesco here. The rates for older children are better elsewhere so I’ll keep the Tesco one for now and reevaluate when she turns 6/7. It’s 4% interest on a maximum of £9k a year. You will probably make more elsewhere on a stocks and shares isa but I don’t personally like the risk.
Vanguard junior isa