It looks like the clients Bond withdrawals are increasing, but why as I added a pounds and pence figure?

Lets say that you calculated the 5% Tax Deferred allowance and added this as a Pounds and Pence withdrawal.

When looking at the Plan overview it looks like the income is increasing in some years and this isn't something that you can add.

The increases that you see will be because EVPro displays in Today’s Prices (Real Terms). The chart discounts future nominal values to express them in present-day purchasing power.  Even with a fixed 5% p.a. withdrawal on a Bond, inflation causes its real-terms value to change over time, and once the underlying bond balance is fully depleted by drawdowns, payments cease.