been back to homebase and found a two pack of dining chair cushions/pads for 98p not on their website, they do have a different design on the website though for £1.98, collect at store only. The photo links to the £1.98 ones.
The ones I have the product code is 278127, they are a turquoise colour with white leaf design and scandi birds. Thought it was worth a post as same cushions with a different design were £9.99 for a pack of two, there was also at least 20packs left. The price didnt stand out either, I was just browsing along the aisle.