how much should i save?

£1, $1 or 1€ saved today will not be worth the same in few years, as inflation will cause it to lose value thus decreasing your purchasing power.

If your goal is to generate a return on your savings in the long run, you need to find an account or investment that ‘beats inflation’.

The national average interest rate for savings accounts is 0.07 percent.

You shouldn’t save with the intention that your savings will allow you the same purchasing power as it did 2-5 years ago. Your savings will not grow at the same rate as inflation to beat it.