You can cash-out or sell your bond for a Sales Fee but liquidity may not always be available. In addition the ultimate annual interest rate you earn will be reduced to reflect the amount of time you actually ended up investing for and the rate that was applicable at the time you invested (for example, if you invested for a five year term but withdrew after a year, our system works out what you would have got had you invested for a year at the time of purchase and this is what you receive).
To see what your final capital and interest returns would be in the event of confirming an early withdrawal you can click the cash-out button which will clearly lay out the associated charges for withdrawing early before you confirm the cash-out.