Fair enough your still learning your trade, and well done for asking when your not 100% sure. A good trait........
When you boil it down you have a 40A MCB supplying 2 x ring mains, a 32A hot tub, a 16A radial (which you haven't given any details of) and 2 lighting circuits. You must see that this is likely to overload the 40?
As much as a pain as it is, you need to tell your customer that they need to replace the supply to the garage.
Its not easy when you are just starting to tell the client "bad news" and other chancers may come along and do just what you said. However if you intend to be a decent Electrician you must get used to the idea that the customer is not always right.
When you boil it down you have a 40A MCB supplying 2 x ring mains, a 32A hot tub, a 16A radial (which you haven't given any details of) and 2 lighting circuits. You must see that this is likely to overload the 40?
As much as a pain as it is, you need to tell your customer that they need to replace the supply to the garage.
Its not easy when you are just starting to tell the client "bad news" and other chancers may come along and do just what you said. However if you intend to be a decent Electrician you must get used to the idea that the customer is not always right.