So on an investment side of things (and not day to day spending)

I see hat the LSE now sell BTC on there exchange in the following tickers

Code   Instrument name   Price
ABTC   21SHARES BITCOIN ETP   28.37 GBP
AETH   21SHARES ETHEREUM STAKING ETP   34.24 GBP
BTCU   21SHARES BITCOIN ETP   36.05 USD
CBTC   21SHARES BITCOIN CORE ETP   20.06 GBP

Has anyone ever done it like this and used a stock exchange to buy there from

How safe is it?
How dose the price differ from BTC its self?
What commision do they charge?
And when you purchase this way, do you actully own BTC or is it a futures market?

Thanks