The photos aren't doing it for me, they make each room look really small. For example, is it the main bedroom with the black wardrobe to the right of the door? Suggests to me the room can only fit a double wardrobe, not enough storage. Each room needs to be photographed to show as much as possible and look appealing in the square mobile view as well as the landscape gallery view.
Why no images of the 4th room, study, utility? The back garden images don't show how it all ties together, why no image from the conservatory door looking out? Or the end of the garden looking back towards the house?
I'd accept the main bathroom needing updating, but if the ensuite and cloakroom do too, then that's £15-£20k budget. I'd probably give everything a coat of cream or white paint too, to make it look fresh, and agree on decluttering like crazy before the photos and keep it that way for viewings. Clutter says there's not enough storage.
Take it off for a week, sort new photos, pop it back on at £450k.