Assuming the wood is mechanically sound, yes. However, a new CU is likely to be significantly larger than an old Wylex Standard or similar. Also, if the board is DNO owned, you shouldn't attach anything to it without their permission.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local