Why upgrade your board?
This would provide far more protection to your home and much more importantly, you and your family, is it time for a change? A new consumer unit will bring your home up to current electrical safety standards. they are also easy to use, if a fuse blows you've got to change the fuse wire, if the MCB blows on the new board, you just switch it back on.
How safe would you feel knowing your electrics did the following:
An RCD has to trip in less than
0.2 seconds / 0.4 seconds depending on system