Steve, thanks for the input, I think they were a large department store and would have stocked sets for Christmas, so were not recognised as a srockist
Fran, the polly insert was generic and as the set only contains 4 wagons the "Extra Storage Space" stickers were placed in the empty slots,
The Slainte Express had a similar empty slot as it only contained 2 coaches whereas the similar UK BR version had 3