@Lottie perfect , thank you !! X
Only the ones with barcodes on them like the green one.
All stamps (Queenie or Charlie) need to have the barcode now
You can swap the old stamps for new ones, look up stamp swap out scheme
You can swap the non-barcoded ones for valid stamps https://www.royalmail.com/sending/barcoded-stamps
You can’t use any of these, as they don’t have the bar code. The deadline to swap them passed over a year ago. You’ve wasted a lot of money unfortunately!
Only the ones with the barcode are valid. The queen can still be used as far as I’m aware but must have barcode like the green one.