How much interest would you earn a month from 125 million pounds?

The interest earned in a month from £125 million depends on the interest rate. For example, if the annual interest rate is 2%, you would earn approximately £250,000 in a month (calculated as £125 million x 0.02 / 12). If the rate is higher or lower, the monthly interest would adjust accordingly. Always check the specific interest rate to calculate the exact amount.