What is the name of this sheet material

[woodypup59]

Had this for 30 years and call it lamiboard but that name seems to mean something else now.

Bought it from the local builders merchants in 8 x 4 ft sheets to make some really solid shelves.

[Super Sonic]

Isn't that blockboard?

[GasEngineer]

Laminboard or blockboard.

https://hanson-plywood.co.uk/products/blockboard/