Radiator Help!

Hi guys!

Any help on this matter will be muchly appreciated.

I need to remove a radiator in my living room, but I want to be able to replace it at some point down the line as the house is rented (landlords permission already granted).

Once the radiator is removed, I will be placing an item of furniture in its place which has a HOLLOW back. Meaning that I can leave the radiator pipes, with the valves attached, in place, as there is space for them to be there and they will be protected by said item of furniture.

I have a combi boiler and a pipeentering on either side of the radiator. One of the valves (RHS of radiator) is adjustable and numbered 1 to 5 (unsure if this is a Thermostatic Valve).

I'm fairly confident with how to remove/replace the radiator but I need to know if I need to drain down the entire heating system and cap off the pipes, EVEN THOUGH I am leaving the pipes and valves, as they are, in place?

Thanks!