Upholstery foam (Goldington MK41)

See pictures. Large piece is 2ft (60cm) square plus a bit 1ft x 1ft. Some small bits too. Big square is 7.5" deep but top layer 1.5" is easy to remove. Other bits are 6" deep.Cuts with a breadknife.
This is the remains of what a kind Freegler let me have yesterday. She said others had asked about it so maybe someone still needs this.