Whilist investigating leaking pipes on my flat roof I noticed some dodgy looking wiring. I have electric cable exiting my bathroom external wall and routed along the outside wall and into a homebuilt conservatory. The cable is the thick grey cable used under floorboards. I belive it must run underneath the floorboards beneath the bath also. The elecrical work was completed by the last owners - so far every job I tackle unearths DIY hell. Can someone please advise if the cable route is safe, I'm concerned about water from the bath and UV damage to unprotected cable outside.