The appearance and revival of handmade grog-tempered ware producing pottery industries during the late 3rd and 4th centuries using technology more appropriate to the Late Iron Age in the south and south-east of Britain is something of an enigma. This revival in the popularity of such primitive pottery took place on the Isle of Wight and in the Hampshire Basin, East Sussex and Kent at a time when the production of Romanised wheel-turned grey and fine colour-coated wares was still on a large scale in the south of Britain and elsewhere in the British provinces. This publication is the result of 25 years research into these grog-tempered wares: it presents corpora of forms associated with the various industries and discusses the distributions of their products at different periods. It also discusses the possible reasons for the revival of such wares, increasing popularity during the 4th century and disappearance during the 5th century AD.