You lot thinking 10% is achievable are overly optimistic IMO, especially as the stated sum is nearly 30x the ISA limit so you’ve got tax to deduct…
FTSE total returns have averaged 7% pa since I started putting savings away in a tracker in 2003
I think they’ll decrease further as well: the days of the 12% long term average ended in the 1980s. Check out OECD growth forecasts and consider how we’re running up against planetary resource limits (hint: under the circumstances, slowed economic growth is a good thing!).
Although in general I agree with the tracker and low management fees philosophy, I have put money into RIT Capital Partners as well, as arguably a family business might incentivise long term rather than short termist management (which of course is where most managed funds fall down. Not my theory btw, my actuary friends’ idea). RIT has averaged 2% above the FTSE since I bought in 2012, and I believe right now they’re hedging against Brexit risk with a big chunk of emerging markets.