I recently purchased this table, it was sold as G-Plan (because of the chairs) but has no markings or stickers and doesn't scream G-Plan to me. I believe it is from the early 80's.
It has 2 additional leaves to extend the table to ~2.6m, which are stored externally not beneath the table.
I will take some better photos in daylight tomorrow.
Unfortunately one edge was slightly scratched during transport - a piece of grit got trapped in one of my blankets.