Hi, and welcome to ExTS
I don't know of one - somebody else may :)
What did come to mind ..... if you are offering to volunteer your services for free ....??
Your local secondary school would have a network of possibly 300 stations - and a couple of ICT technicians.
If you wrote to the school they may let you volunteer your services in exchange for some experience.
You would have to be very specific about payment - I know for a fact that they would run a mile if that was mentioned :)