Imagine before the June 23rd 2016, you held £100,000 in cash.

Around about the 1st June, £1 = €1.30

Thus £100,000 sold to buy Euro’s would have converted to €130,000

So, imagine 5 months on, that €130,000 is converted back into Sterling.

Today £1 = € 1.12.

So:

€130,000 converted back to UK £ = 115,760.

Thus a potential gain of £15,760.