I thought that T+E couldn't be used outside because of the uv rating and that degrades the cable causing it to crack and split? but like most of the time i stand to be corrected.
Don't worry mate,
I had similar experience with a sparks from our rival scam, I went to survey a job and the lady wanted (insisted) a induction range and wouldn't budge on it, I recommended that she contact her supplier and enquire about an upgrade from 60A to 100A, especially since she is...
Make sure you ring them first, i had to drive around to about three branches once because some of them don't keep stock, and I got my favourite quote, ' we can get it for you tomorrow'