Moving radiator, pipes underfoot threshold

[kitessurfer]

Hi all, currently at outset of general living room renorvation. My wife wants this rad moving or all pipe work covered. I must say looks a bodge job from previous owners. Radiator which I changed about 6 years back appears to be plumbed inline. Both pipes running under door threshold and reappear as in the photos, however not sure which pipe is which one . It looks messy. I'm thinking of moving rad to the right of the door then cutting back old piping before making good everywhere. I may cut into wall next weekend, I can see expanding foam and guess this has been squirted all around piping before plastering. Any guidance or ideas appreciated Simon