You missed a 1-11 out Buster.
When Ryanair first got their hands on London European they transferred one of their 1-11s across and became GBNIH. They continued to operate Brussels and Amsterdam until they pulled out of the scheduled market and bought the 3 x 1-11s (GDJOS, GEKPT & GFLRU, ex GAYWB, GAXLN & GAXMG respectively), GBNIH returning to Ryanair. They mainly did the Italian charter flights that were popular in the 80s and 90s.