Yes 6.0mm cable will carry 47A, providing no other factors such as routed withing insulation and conduit/trunking. But you require a 40A MCB rather than the 50A listed on my link, should not be a problem getting one.
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