OK, after naively overlooking the fact I need a hydraulic crimping tool to attach a plug, I've abandoned the current cable in it's entirety
The good news is that I managed to get a 5m, Type1 tethered cable second hand for £35 from ebay.
Unfortunately due to the odd shape of my house and placement of the garage door, there's no room on the outside for the EVSE. The PodPoint unit is inside the garage, so I went with tethered, and tucked the cable into a notch in the garage door frame (see pictured). If I had an untethered unit, I would still have to have it go under the garage door, and still probably be chewed. (see pic)
View attachment 138951
I think what I'm going to do, is drill a hole in the garage door frame much higher, poke the new cable through there, and have it hang a bit like a petrol hose (if that makes sense)