triple pole isolater diferant size fuses

[beaver74]

hi all
can any one think of a reason why you cant have a triple pole isolator with 1x32 and 1x63
as i have job where i need to supply house 63 and a hot tub/shed32 thinking of isolator so i still have single point of isolation but cant think of any other way
room open for discusion

cant feed from house as the last bloke who was there fed house from 100A headbuty then derated it down to 63A to the house and it is a large house diversity is coming out at 50A

 

[tomxhug]

Would it be possible to put in a main switch and then split the supply at a Henly style service phase block to the 2 sub circuits?

 

[beaver74]

all in external meter box tight for room