From 8 to 10 February, POP provided instructors from BSC, JSC and NAG for the 24th VI-HPS Tuning Workshop which was held at the University of Southampton, England, co-organised by POP and the UK PRACE Advanced Training Centre at EPCC.  16 attendees participated, mostly from the hosting university and the rest of England, bringing their MPI and OpenMP parallel applications to analyse on the ARCHER Cray XC30 at EPCC with the performance tools from BSC, JSC and Allinea/ARM.  Following initial demonstrations and hands-on exercises with prepared examples to familiarise participants with using the tools, they received assistance and advice for their own application codes, concluding with an overview of POP services.