plumber first fix

Hi, This is my radiator in my bathroom. I want to change it to a towel rail. As a chippy I’ve done fair bit of plumbing but want advice on changing this. What would be the best pipe lay out? It’s a 500 rad getting changed to a 500 towel rail. I know the tails come underneath. Could I put a...

My builder wants to install chipboards on the loft conversion to have a solid working platform before plumber first fix. My question is how the plumber will be able to run the pipe through the joist without removing the chipboard? Does not sound ideal for me as the plumber will need to bring...