I always like to see something different, and thought some of you may be interested in this too.
It was only a matter of time before reports came in with Machin stamps with dull phosphor incorporating an error. In this case it is an inset band right (DGN12). I was however surprised to see this with a 2015 printing date.
I spotted it on eBay this morning.
Described as 1st class printed by Walsall with a code of MA15/ MBIL from a business sheet, dated 28/05/15.
Buy it now price is £2.50 with £1.00 Postage and Packing.
Going through the the sellers other sales I noticed he has many stamps for sale with dull phosphor.
In among these he has a second listing for sale (inset right).
He does not state if these issues are on security backing paper or plain backing paper, so I am assuming they are on plain backing paper.
The second Machin is a business sheet header 4 x 1st class value (inset right) for sale at the higher price. Buy it now £13.75 with the date of 25/08/15, The seller charges postage and packing at £1.20 for this item.
Two nice items if you are interested, just do an eBay search for dull phosphor.