On 11 July, Royal Mail issued a new Custom Booklet that I think is rather charming. The booklet contains 4 1st Class stamps in the new 'Royal Mail Red' with M13L date code and MCIL source code. The 'C' stands for Custom. The booklet also contains two 1st Class commemoratives. The Chalkhill Blue butterfly and the Comma butterfly. Although Royal Mail have this booklet listed as having been printed in Lithography it has been done in Grauvre. Royal Mail lists the printer as Cartor. It has been brought to my attention that these booklets were likely printed by Walsall. The two commemoratives are all-over phosphor. The definitives have two phosphor bands.