A bit of a live wire

More accurately there are three live wires that I found under the floorboards of this customers house

We found the two black flexes and red single core cable under a floorboard whilst re wiring a house. The yellow volt stick device glows red when the cable is live. This was a considerable fire risk, as you can see, these live wires were a small bit of yellow tape away from the ninety year old wood which was all around it! The worst bit is that with five minutes extra work, they could have all be completely removed at the junction box or connecter you can see in the picture. (The connector would need to be replaced as well but I'm trying to keep things brief.)