I wouldn't really say that the banks are 'lending the £10 on'. The loan is simply creating new money. There is no absolute association with the money that was deposited. All the bank has to make sure is that it will have enough 'cash' (cash, bank of england account) to cover the demand for withdrawals at any one time. Pertinently, when a new loan is going into another account at the same bank, then there is absolutely no change in the bank's cash position.
The key points that I would wish people to understand is that as a whole,
we are renting our means of exchange from the banks, it's very much like a casino where the banks take a cut of every pot.
The money system is not creating value in the economy, but extracting it.
As I understand it, primitive societies generally settle on a 20-hour working week. Yet for most working people - despite great technological advancements helping us manage everything - a 20hr week simply isn't an option. It should really be clear that something is desperately wrong there. I say this is because our money system is enslaving us.