Sorry "Liffy 1M" looks if your info is incorrect, checked two different sources and this is what l have found for delivery dates, these may be date left Boeing or into UK.
G-BIKB was the first in Europe on 25/01/83, followed by "KC" on the 31/01/83, then "KD" on 10/03/83, then good old "NB" on 22/03/83, then "KA" 28/03/83 and into 6th place what would have been "KE" but became G-BKRM on 30/03/83.
Mr @ Spotty M, I didn't post information about delivery dates!