Have you the space in your consumer unit ?
If so, turn off the mains, connect neutral(black) to the neutral block. Connect Earth (bare) to the earth block after sheathing it in yellow/green sleeve.
Now the fun bit, the most powerful 'draw' should go next to the mains isolating switch/rcd and the smallest (i.e. lighting, 5amp) furthest away. This means you are going to have to move all your other mcb's along one space on the busbar to accomodate your new shower mcb.
Hope thats clearer than mud !!
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