Tks for the reply.
I had an electrician at the house who said he'd provide and install for E400. I was a bit shocked at the price so tried phoning around several electricians for an idea of what it might cost - several wouldn't say over the phone; one, when he discovered that I lived too far from him for him to do the job so I asked what it might cost me said 'I can't say because each electrician has different rates' ....
Eventually got a recommended electrician who would provide and install for E250.
Hell of a difference!