Paying mortgage with SIPP

ElephantBoy57

I am 59 and I still have around seven years left on my mortgage.

Maybe around £30k left, I have shares to the value of £7k but no cash savings.

Can I decide to open a SIPP and put some of the funds from my salary in, that salary would then be used to pay my mortgage.

I would then benefit from tax relief, or does the money need to stay inside the SIPP for a minimum amount of time?

But in principle, I could do that? It just sounds wrong.