One of my many visits to the famous PinkPop Festival in 1981, headlining was Ian Dury and his band, who turned it into a great party.
Remember Russia
This edition was one with many bands at the beginning of their career. From Holland The New Adventures. I think for U2 the first performance in the Netherlands (with a very nervous Bono). UB 40 got the 50,000 people moving along with Madness. For the hard rockers there was The Michael Schenker Group. The band Fisher Z was a pleasant surprise, see this registration.
Marlies
The name Fischer-Z is derived from a term from statistics (Fishers z describes confidence intervals in correlations). Originally the band was called Sheep, but little has been heard under that name. The focal point of Fischer-Z was John Watts: he was the composer-singer and later also the producer of the band.