ETF recommendations?

[Cloudy147]

Hi all,

Just looking for some recommendations please. I m using investengine at the moment for an ISA and have got 100% in Vanguard FTSE All-world.

Is this a bad idea? Should I spread across other etfs or is this ETF in itself diverse enough? Was considering Vanguard S&P 500 but not sure if it s worthwhile?

Any others worth recommending?

Thanks!