Twenty 120cm Polystrene/Styrofoam Insulation Sheet/Blocks (Wokingham RG41)

- 16x of one type which is 450cm x 50cm and is tongue-and-groove,

- 4x of another type which is 50cm x 60cm and is straight squares.

They're in a bit of a rough state, pieces out of them and so on, but usable as complete blocks or in smaller pieces.

You can take some or all of any, but the more the better.