The large-scale use of beryllium and tritium at JET has limited the possibility of performing frequent and regular inspection of the modification of plasma facing components. Relatively sparse information exists on impurity transport and flows in the Scrape-Off Layer (SOL) plasma although this determines largely the migration of material and thus global erosion and re-deposition patterns. Therefore, the application of short-term plasma-inserted probes of various types is helpful as it permits the combination of in-situ electrical measurements with ex-situ surface analysis of the probe morphology. Results obtained with various electrical probes show a strong flow of the deuterium background plasma directed towards the inner divertor leg. The flow is believed to drive also impurities released from the walls.