ronp wrote:

Warning:
Do Not Run and Undertray Kit Without an Exhaust Mod !!!

I did apply another type of modification, but it didn't work and I had started to get some damage.
[Magnashield Heat Tape - I lined the undertray & bumper - but no difference]
Firstly, the corners of the undertray were coming away a little.
On inspection the foam adhesive strip had frazzled and a gap was appearing.
To inspect further, I attempted to take off the removable panel, but it wouldn't release from the studs.
Eventually I had to yank it and found the tips of most of the stud had melted and therefore wouldn't easily release from the locating points.
In fact one of the stud locating points has snapped off due to this.
When the cover was eventually removed there was thick soot all over the panel and on the towbar electrics.
I've also just realised that my now intermittently working rear parking sensors will be because of heat damage.
I'll need to remove the rear bumper to inspect before seeing if it's the wiring and/or sensors that have melted.
Thankfully though I've just been towing and those electrics were working ok, but I'll need to check out the condition of the loom when the bumper is off.
So extra parts will no doubt be needed and fitted as required.
Needless to say I learnt my lesson and purchased the proper exhaust kit from TLO and had that fitted at my local garage and I now have no heat issues.