How should I plaster over this pipe?

[redhexagonal]

There is a plastic pupe running up the corner of my living room that is chased into the dot and dab wall, it was almost at the surface at the top and caused a big crack. I’ve repaired the crack for now with toupret filler but I’m wondering if there is a stronger method I can use where it is very close to the surface like in the corner here?

 

[oldbuffer]

1. If its a hot water pipe it will expand and contract and split the plasterwork eventually.
2. If it cold water, not a problem.
3. As a crude fix I'd be tempted to put some bubble wrap around the pipe and use plaster / filler over that.
4. If space won't permit 3. above, you'll need to move the pipe in the room above.

 

[redhexagonal]

1. If its a hot water pipe it will expand and contract and split the plasterwork eventually.
2. If it cold water, not a problem.
3. As a crude fix I'd be tempted to put some bubble wrap around the pipe and use plaster / filler over that.
4. If space won't permit 3. above, you'll need to move the pipe in the room above.

It is a central heating pipe. There is no room to put bubble wrap around it because its so shallow. Is there any compound i could use to fill this that won’t crack? Woodfiller maybe? Pva in the filler? There must be a trick. Moving the pipe would be pretty difficult