The excavation of two adjacent round barrows at Trelystan, Long Mountain, Powys, in igjQ, has revealed a complex sequence of Late Neolithic and Early Bronze Age funerary structures and traces of Late Neolithic settlement. The earliest structure was a large pit grave, dated to about 2400 be, which was superseded at about 2200 be by a settlement represented by stake-walled buildings associated with Grooved Ware. Following this some activity took place, possibly domestic, which is represented by sherds probably derived from several southern Beakers, which by analogy with sites elsewhere are to be dated to a period after about 1850 be. The subsequent Bronze Age cemetery, dated to between about 1800 and 1500 be (but possibly continuing later), presents a sequence of burial types and structures which can broadly be seen to illustrate a change from the concept of barrow cemetery to that of cemetery barrow. The earliest burials, which consist of cremations in pits and occasionally accompanied by a Food Vessel, were covered by separate small mounds of stone or turf, or a combination of the two. These were eventually overlain by and amalgamated beneath two larger turf barrows associated with Food Vessel Urns, which employed stake circles in their construction and which acted as repositories for additional cremation burials. The cemetery was sited along a pre-existing boundary fence, set up after the Late Neolithic phase, which was renewed at various times throughout the life of the cemetery in response to changes in its layout. A small undated cemetery of inhumation graves, possibly of the Early Christian period, was founded on the eastern side of the barrows at a later date.

Eight ring-ditches and several stretches of pit alignment have been excavated between 1981 and 1985, as part of the investigation of an extensive cropmark complex on a gravel terrace in the Upper Severn valley at Four Crosses, northern Powys. Excavation of the ring-ditches, which form part of a more scattered barrow cemetery, has revealed a long and complex pattern of development of barrow types and burial forms in the period between the Middle Neolithic and the Middle Bronze Age. This is compared with the recently published sequence from the neighbouring upland barrow cemetery at Trelystan, and subdivided into four hypothetical phases. There is evidence of activity in the vicinity of some of the sites in the Iron Age, Romano-British, and possibly the early post-Roman period.

Small-scale rescue excavations at Llwyn Bryn-dinas hillfort, on the Welsh Borderland, showed that the earliest fortification belonged to the late Bronze Age, with radiocarbon dates in the late 9th and 8th centuries be. A terrace, subsequently cut into the rear of the rampart to accommodate a metal-working floor, was associated with a radiocarbon date centred in the late yd century be. Detailed analysis of the metal-working debris suggests that copper-alloy casting, iron forging and possibly bronze production were carried out within a single workshop. The finds include a distinctive form of handled crucible. The industry appears to have been fairly small-scale, of short duration, and probably only designed to meet the internal needs of the hillfort population. The excavation adds significantly to the local evidence for metal-working during the later prehistoric period. A distinctive zinc-impurity pattern in the copper alloy and raw copper, previously identified in material from other sites nearby, confirms the suggestion of an Iron Age bronze-working industry based on a specific metal source in the north Powys area. In addition, analysis of the iron-working debris suggests the exploitation of a distinctive local ore body. The metal-working activity appears to have come to an abrupt end, possibly with the enlargement or local repair of the rampart. Later phases of activity include a final occupation deposit with an associated radiocarbon date centred in the mid 2nd century be.

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