I think these(or the Sows) are provided from 'Jimmy's Farm' which is also in Essex. Piglet on the far left is badly mismarked and will no doubt end up as bacon, as will some of the others without the exactly correct markings probably!
Colchester have had a few females with piglets over the past year or two. They certainly seem to be in good connection with 'Jimmy's Farm' where all of them are supplied from.