Trust me, with hindsight, it really is that simple.

Sorry to be blunt, just going to say it, that portfolio looks totally mental especially for an investor with a 60+ year time frame. I could see the rationale if it were a tactical position, with intention to rebalance within the portfolio, and adjust in future conditions. But are you going to do that? And when granddad shuffles off this mortal coil, is anyone going to be doing that? I shudder at the cumulative loss to fees over the investment horizon - that’s one hell of a hurdle to get over to beat a simple passive strategy.

Echo the majority of the people above:
1) open account with Fidelity (zero fees for junior products)
2) deploy money into Vanguard Global All Cap (or ETF equivalent VWRP if you really wanted - I don’t see the point)
3) forget about it until next year, when you repeat (2)

I’d also steer towards filling Junior ISAs first - a life-changing help to me at age 25 would have been £50k for a deposit, not a slightly larger pension pot accessible 30 years hence. Relax about the idea of giving up control and trust them to be raised with a sensible head on their shoulders

Looking at that lot, and my first thought is: where's the MSFT, AAPL & GOOGL exposure? And while SMT does seem to have a bit of TSLA, NVDA & AMZN, if you don't have quite a lot of SMT you're going to be quite underweight (vs. global indices) those too. The whole PF looks like raging contrarian bet that global indices (and therefore investors) have it completely wrong about the tech mega-corps. It's a legitimate position, but is it really reasonable/responsible to project it onto a toddler?

And as for CTY... that's a stock for pensioners. Something like FCIT surely more appropriate for a PF that won't/can't be accessed until decades hence?

So anyway, yes it could be more diversified by adding a big slug of global tracker (or global trust like FCIT, ATST etc) in there.