Remove supports no longer needed for attic cistern?

[tuck1s]

We've recently had our system boiler and hot water cylinder (in the airing cupboard) replaced. All went smoothly, we now have a pressure-fed system hot and cold, so the CH vent tank and cold water cistern have both gone. We're left with the support for the tanks that was previously distributing the considerable weight vertically down into the roof trusses - see pics.

I'd like to remove the ply (have to cut it into 3 pieces to get it back through the hatch) and the horizontals so I can re-finish the loft with a bit more insulation and boards at the same level as the rest of the attic. As far as I can tell, I would not be weakening the trusses by removing all the unneeded stuff, but I wanted to check here first.

 

[cdbe]

Why remove the ply when it could be used as flooring?

 

[tuck1s]

Why remove the ply when it could be used as flooring?

It could be reused, and it's obviously good stuff. However it might make more sense to use T+G that keys in with the existing boards. I firstly want to know it's going to be OK structurally.

 

[JohnD]

You can remove the platform, but do not cut or remove any of the original structure. If this has already been done it must be reinstated. Stand back and take wider pics to show the whole roof construction.