The OP hasn't made it clear if this is 'fabric', like a stud wall, or 'furniture', like a freestanding wardrobe. Fabric would be part of the fixed wiring installation, whereas it wouldn't be a good idea to hardwire an item that could be moved around because moving it around could affect the rest of the circuit (breaking the ring or loose connections).
There is a sort of ambiguous space in the way that fitted kitchens have sockets on the carcassing - they're freestanding and in theory movable, but it practice pretty fixed. The FCU approach addresses that because it means it's possible to remove the unit by simply unwiring the cable from the FCU without disturbing the rest of the circuit wiring, and it's possible to isolate the socket (for example you have a leaky sink over the dishwasher socket).
Without knowing the details it's hard to make the tradeoffs.
Theo