Hillside Leisure Birchover, leaking tap

[Pete Newcombe]

I have a leaking sink tap on a friend’s Hillside Birchover T6. Wondering how to get to the bottom push fit joint on the flexible hose without cutting a whole in the unit or dismantling the whole interior .
She’s tried to get intouch with customer service and got no reply.
Nothing on you tube for a Birchover .
TIA
Pete