This is very much a personal view but the GR1 was one of the first aircraft which had lots of internal toys to look at.
As a lowly SH man in the late 80's we were always on the lookout for non-deviating fins which inevitably stormed around the North German Plain as pairs/fourships. The best tactic was to stay low and accept the risk that a GR3 Mate might be at the same level!
PS. Did the crew recovery for the Tornado/Alpha Jet mid-air - not one of my happiest days.