1st Large Royal Mail red M20L MBIL
I am not sure why this is different to the stamp featured in the last article. Maybe the backing paper has the text reversed, which I don't list separately, and it has come by mistake.
The £2.42 value now has the very bright fluor that has been appearing a lot recently and is very noticeable with a UV torch but not without so if this doesn't concern you that's probably another you needn't buy.
You will need this one, finally getting its M20L MAIL code.
And this, the first appearance of M20L MSIL
And this, the first appearance of M20L MBIL